eureka math grade 1 module 2 lesson 23 homework

Eureka Math™ Homework Helper 2015–2016 Grade 1 Module 2

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Parent Guide to Gr. 1 Eureka Math

Read-Draw-Write Strategy (RDW)

Resources by unit.

Below is a brief description of the topics for each unit. Links to videos are provided to help you understand instructional strategies being taught in class.

  Module/Unit 1: Sums & Differences to 10

In this first module of Grade 1, students make significant progress towards fluency with addition and subtraction of numbers to 10 as they are presented with opportunities intended to advance them from counting all to counting on which leads many students then to decomposing and composing addends and total amounts. Students continue to use the Kindergarten strategy of number bonds to determine pairs of numbers that add to 10.

In the context of addition to 10, students expand their knowledge of two basic ideas of mathematics: equality and the commutativity of addition. Students also learn that the equal sign is a symbol of the equality of two values, rather than that an equation represents an expression on one side and an answer on the other side. This understanding is foundational in allowing students to later construct true number sentences such as 4 + 3 = 3 + 4 without misunderstanding the equal sign to mean that the numbers are the same. Students create sets of related addition and subtraction facts and use dialogue to explain their found connections (e.g., 7 = 4 + 3, 7 – 4 = 3, 4 + 3 = 3 + 4, 4 = 7 – 3, etc.) They will also work with story problems, which help them understand addition and subtraction in relation to real world situations.

Some of the video links below will take you to another school website, where the teachers have created short homework videos to help parents help their students. If you have questions on homework, refer to the number in the top right corner of the worksheet and then find the corresponding video link below.

Module 1 Lesson 1 Instruction Module 1 Lesson 2 Instruction Module 1 Lesson 3 Instruction   Module 1 Lesson 4 Instructi on Module 1 Lesson 5 Instruction   Module 1 Lesson 6 Instruction   Module 1 Lesson 7 Instruction   Module 1 Lesson 8 Instruction   Module 1 Lesson 9 Instruction   Module 1 Lesson 10 Instruction   Module 1 Lesson 11 Instruction   Module 1 Lesson 12 Instruction   Module 1 Lesson 13 Instruction   Module 1 Lesson 14 Instruction   Module 1 Lesson 15 Instruction   Module 1 Lesson 16 Instruction   Module 1 Lesson 17 Instruction   Module 1 Lesson 18 Instruction   Module 1 Lesson 19 Instruction   Module 1 Lesson 20 Instruction   Module 1 Lesson 21 Instruction   Module 1 Lesson 22 Instruction   Module 1 Lesson 22 Instruction   Module 1 Lesson 23 Instruction   Module 1 Lesson 24 Instruction   Module 1 Lesson 25 Instruction   Module 1 Lesson 26 Instruction   Module 1 Lesson 27 Instruction   Module 1 Lesson 28 Instruction  Module 1 Lesson 29 Instruction   Module 1 Lesson 30 Instruction   Module 1 Lesson 31 Instruction   Module 1 Lesson 32 Instruction   Module 1 Lesson 33 Instruction   Module 1 Lesson 34 Instruction   Module 1 Lesson 35 Instruction   Module 1 Lesson 36 Instruction   Module 1 Lesson 37 Instruction   Module 1 Lesson 38 Instruction   Module 1 Lesson 39 Instruction

Lesson 1 HW Help Lesson 2 HW Help Lesson 3 HW Help Lesson 4 & 5 HW Help Lesson 6 & 7 HW Help Lesson 8 HW Help Lesson 9 HW Help Lesson 10 HW Help Lesson 11 HW Help Lesson 12 HW Help Lesson 13 HW Help Lesson 14 & 15 HW Help Lesson 16 HW Help Lesson 17 & 18 HW Help Lesson 19 HW Help Lesson 20 HW Help Lesson 21 HW Help Lesson 22 HW Help Lesson 23 HW Help Lesson 24 HW Help Lesson 25 HW Help Lesson 26 & 27 HW Help Lesson 28 HW Help Lesson 29 HW Help Lesson 30 HW Help Lesson 31 HW Help Lesson 32 HW Help Lesson 33 HW Help Lesson 34 HW Help Lesson 35 HW Help Lesson 36 HW Help Lesson 37 HW Help Lesson 38 HW Help Lesson 39 HW Help

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Eureka Math² ®  is a revolutionary Prekindergarten–Algebra I* math program designed to advance equity in the math classroom by helping students build enduring math knowledge.

In Eureka Math² you’ll still find the consistent math models, rigor to support the productive struggle, and coherence across grades that you love from Eureka Math® .

Now you’ll also find digital interactives, increased opportunities for student discourse, and a new level of flexibility to make math instruction exponentially more teachable and engaging.

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Eureka Math² was recently reviewed by EdReports for its alignment with the college and career readiness standards. Scan the QR code or access the final report.

The most celebrated math curriculum is now even more joyful to teach and learn

Advancing equity through math instruction.

How can a math curriculum advance equity? By providing teachers with high-quality materials and tools to ensure students build a conceptual understanding of mathematics.

Our Eureka Math² teacher–writers and experts used a research-based approach to craft a new curriculum that ensures students build enduring knowledge.

Learn more about our commitment to accessibility .

Read more about how we’ve incorporated the principles of the Universal Design for Learning to account for learner variance so all students can access grade-level content.

See how lessons and modules are intentionally organized to leverage connections between concepts, and progress conceptual understanding from simple to complex to help students access new learning and problem-solving.

Through an intentional integration of digital resources , a focused approach to encouraging student discourse, and by connecting lessons to real-world math, students stay engaged in the learning. Get access to the curriculum .

Through this knowledge-building approach, Eureka Math² helps teachers unlock the greatness in every child.

Watch this guided walk-through of the curriculum to learn more .

Access our state alignment studies to see how Eureka Math 2 supports your mathematics standards .

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The Intersection of Art and Math

While students often think of math as simply numbers, we know that mathematics itself is an art—and math is a key element of artistic compositions throughout history. Eureka Math² brings that connection to center stage by featuring a piece of fine art that has a connection to the math taught in the module. With this focus, the art provides a novel entry point for all learners to engage with while building knowledge of math concepts.

Everything Needed to Teach and Learn Math

Eureka Math² includes print and digital materials designed to engage students and provide teachers with high-quality materials to lead every math lesson with confidence.

For Teachers

The Teach book is the Teacher Edition and is also available in Spanish for Grade Levels Prekindergarten–Algebra I . 

The Great Minds ® Digital Platform teacher access provides lesson facilitation slides along with all the same content found in the Teach book.

Achievement Descriptors represent what students should know, and Proficiency Indicators show what knowing looks like.

Pre-Module diagnostic, formative, and summative assessments provide teachers comprehensive visibility into student learning.

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Family Math Night Resources provide teachers with ready-made tools that create a rich, productive, engaging Eureka Math 2 family night in your learning community.

For Students

The Learn book is the student edition and is also available in Spanish for Grade Levels Prekindergarten–Algebra I . It provides students with in-class lesson supports, problem sets, and formative assessments ( Exit Tickets and Topic Tickets ). 

The Apply book provides students in Grade Levels 1–5 with additional practice for home.

Digital lessons and interactives fuel student discourse.

Math context videos provide students with low floor/high ceiling learning opportunities as they explore real-world math.

Family Math and Practice Partners provide caregivers with guidance on how to best support their mathematicians at home .

Open-middle and open-ended tasks empower students to find their own solution pathways.

Hands-on math manipulatives provide students with kinesthetic learning opportunities .

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Guidance and Coaching Built into Every Lesson

High-quality curriculum can transform a classroom, but only if teachers have the support they need to implement it. Eureka Math² teacher–writers and experts crafted the curriculum with point-of-use notes to guide teachers on:

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Professional Learning from a Trusted Colleague

Our math team members have crafted a series of professional development sessions and personalized coaching bundles to support both teachers new to Eureka Math² and experienced implementers.

Flexible lessons allow teachers to focus on the needs of their students.

Do you have any questions you would want to ask our experts? Check out our Frequently Asked Questions for answers to our most-received queries. Are there other questions you have? We’re here to help.

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Moscow Oblast, Russia

The capital city of Moskovskaya oblast: Moscow .

Moscow Oblast - Overview

Moscow Oblast is a federal subject of Russia located in the Central Federal District. Moscow, the capital city of the country, is the administrative center of Moscow Oblast. At the same time, Moscow is not part of this region, it is a separate federal subject of Russia, a city of federal importance.

The population of Moscow Oblast is about 7,769,000 (2022), the area - 44,379 sq. km.

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Moskovskaya oblast latest news and posts from our blog:.

23 June, 2022 / Natural Spring Gremyachiy Klyuch in Moscow Oblast .

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1 August, 2021 / Savvino-Storozhevsky Monastery near Moscow .

4 August, 2020 / Sights of Moscow Oblast - the heart of Russia .

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History of Moscow Oblast

The territory of the Moscow region was inhabited more than 20 thousand years ago. In the first millennium AD, this land was inhabited mostly by the Finno-Ugric peoples (Meryane and Meshchera). In the 9th-10th centuries, the Slavs began active development of the region. The population was engaged in hunting, fisheries, agriculture, and cattle breeding.

In the middle of the 12th century, the territory of the present Moscow region became part of the Vladimir-Suzdal principality, the first towns were founded (Volokolamsk in 1135, Moscow in 1147, Zvenigorod in 1152, Dmitrov in 1154). In the first half of the 13th century, the Vladimir-Suzdal principality was conquered by the Mongols.

In the 14th-16th centuries, Moscow principality became the center of unification of Russian lands. The history of the Moscow region is inextricably linked to military events of the Time of Troubles - the siege of the Trinity-Sergius Monastery by the troops of False Dmitry II, the first and second militias.

More historical facts…

In 1708, by decree of Peter the Great, Moskovskaya gubernia (province) was established. It included most of the territory of present Moscow oblast. In 1712, St. Petersburg became the capital of the Russian Empire and the significance of the Moscow region as the country’s economic center began to decrease.

In 1812, the Battle of Borodino took place near Moscow. It was the biggest battle of the Russian-French War of 1812. In the second half of the 19th century, especially after the peasant reform of 1861, the Moscow province experienced economic growth. In 1851, the first railway connected Moscow and St. Petersburg; in 1862 - Nizhny Novgorod.

The population of the Moscow region increased significantly (in 1847 - 1.13 million people, in 1905 - 2.65 million). On the eve of the First World War, Moscow was a city with a population of more than one million people.

In November, 1917, the Soviet power was established in the region. In 1918, the country’s capital was moved from St. Petersburg to Moscow that contributed to economic recovery of the province. In the 1920s-1930s, a lot of churches located near Moscow were closed, a large number of cultural monuments were destroyed. On January 14, 1929, Moscow Oblast was formed.

In 1941-1942, one of the most important battles of the Second World War took place on the territory of the region - the Battle for Moscow. In the postwar years, the growth of economic potential of the region continued; several science cities were founded (Dubna, Troitsk, Pushchino, Chernogolovka).

In the 1990s, the economy of Moscow Oblast experienced a deep crisis. Since the 1990s, due to the motorization of the population and commuting, road traffic situation in the Moscow region significantly deteriorated. Traffic jams have become commonplace.

Pictures of Moscow Oblast

Moscow Oblast scenery

Author: Mikhail Grizly

At the airport in the Moscow region

Author: Evgeny Davydov

Nature of Moscow Oblast

Author: Alexander Khmelkov

Moscow Oblast - Features

Moscow Oblast is located in the central part of the East European Plain, in the basin of the rivers of Volga, Oka, Klyazma, Moskva. The region stretches from north to south for 310 km, from west to east - 340 km. It was named after the city of Moscow, which however is not part of the region. Part of the administrative authorities of the region is located in Krasnogorsk.

On the territory of the Moscow region, there are 77 cities and towns, 19 of them have a population of more than 100 thousand people. The largest cities are Balashikha (518,300), Podolsk (309,600), Mytishchi (262,700), Khimky (256,300), Korolyov (225,300), Lubertsy (209,600), Krasnogorsk (174,900), Elektrostal (149,000), Odintsovo (138,900), Kolomna (136,800), Domodedovo (136,100).

The climate is temperate continental. Summers are warm, winters are moderately cold. The average temperature in January is minus 10 degrees Celsius, in July - plus 19 degrees Celsius.

One of the most important features of the local economy is its proximity to Moscow. Some of the cities (Odintsovo, Krasnogorsk, Mytishchi) have become in fact the “sleeping districts” of Moscow. The region is in second place in terms of industrial production among the regions of Russia (after Moscow).

The leading industries are food processing, engineering, chemical, metallurgy, construction. Moscow oblast has one of the largest in Russia scientific and technological complexes. Handicrafts are well developed (Gzhel ceramics, Zhostov trays, Fedoskino lacquered miniatures, toy-making).

Moscow railway hub is the largest in Russia (11 radial directions, 2,700 km of railways, the density of railways is the highest in Russia). There are two large international airports - Sheremetyevo and Domodedovo. Vnukovo airport is used for the flights within the country.

Attractions of Moscow Oblast

Moscow Oblast has more than 6,400 objects of cultural heritage:

• famous estate complexes,
• ancient towns with architectural monuments (Vereya, Volokolamsk, Dmitrov, Zaraysk, Zvenigorod, Istra, Kolomna, Sergiev Posad, Serpukhov),
• churches and monasteries-museums (the Trinity Lavra of St. Sergius, Joseph-Volokolamsk monastery, Pokrovsky Khotkov monastery, Savvino Storozhevsky monastery, Nikolo Ugresha monastery).

The most famous estate complexes:

• Arkhangelskoye - a large museum with a rich collection of Western European and Russian art of the 17th-19th centuries,
• Abramtsevo - a literary and artistic center,
• Melikhovo - an estate owned by A.P. Chekhov at the end of the 19th century,
• Zakharovo and Bolshiye Vyazyomy included in the History and Literature Museum-Reserve of Alexander Pushkin,
• House-Museum of the composer P.I. Tchaikovsky in Klin,
• Muranovo that belonged to the poet F.I. Tyutchev,
• Shakhmatovo - the estate of the poet Alexander Blok.

The architectural ensemble of the Trinity Sergius Lavra is a UNESCO World Heritage Site. The largest museum of the Moscow region is located in Serpukhov - Serpukhov Historical and Art Museum.

The places of traditional arts and crafts are the basis of the souvenir industry of Russia:

• Fedoskino - lacquer miniature painting,
• Bogorodskoe - traditional manufacture of wooden toys,
• Gzhel - unique tradition of creating ceramics,
• Zhostovo - painted metal crafts,
• Pavlovsky Posad - fabrics with traditional printed pattern.

Some of these settlements have museums dedicated to traditional crafts (for example, a toy museum in Bogorodskoe), as well as centers of learning arts and crafts.

Moskovskaya oblast of Russia photos

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Nature of the Moscow region

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Moscow Oblast landscape

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Cathedral in Moscow Oblast

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The Unique Burial of a Child of Early Scythian Time at the Cemetery of Saryg-Bulun (Tuva)

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Pages:  379-406

In 1988, the Tuvan Archaeological Expedition (led by M. E. Kilunovskaya and V. A. Semenov) discovered a unique burial of the early Iron Age at Saryg-Bulun in Central Tuva. There are two burial mounds of the Aldy-Bel culture dated by 7th century BC. Within the barrows, which adjoined one another, forming a figure-of-eight, there were discovered 7 burials, from which a representative collection of artifacts was recovered. Burial 5 was the most unique, it was found in a coffin made of a larch trunk, with a tightly closed lid. Due to the preservative properties of larch and lack of air access, the coffin contained a well-preserved mummy of a child with an accompanying set of grave goods. The interred individual retained the skin on his face and had a leather headdress painted with red pigment and a coat, sewn from jerboa fur. The coat was belted with a leather belt with bronze ornaments and buckles. Besides that, a leather quiver with arrows with the shafts decorated with painted ornaments, fully preserved battle pick and a bow were buried in the coffin. Unexpectedly, the full-genomic analysis, showed that the individual was female. This fact opens a new aspect in the study of the social history of the Scythian society and perhaps brings us back to the myth of the Amazons, discussed by Herodotus. Of course, this discovery is unique in its preservation for the Scythian culture of Tuva and requires careful study and conservation.

Keywords: Tuva, Early Iron Age, early Scythian period, Aldy-Bel culture, barrow, burial in the coffin, mummy, full genome sequencing, aDNA

Information about authors: Marina Kilunovskaya (Saint Petersburg, Russian Federation). Candidate of Historical Sciences. Institute for the History of Material Culture of the Russian Academy of Sciences. Dvortsovaya Emb., 18, Saint Petersburg, 191186, Russian Federation E-mail: [email protected] Vladimir Semenov (Saint Petersburg, Russian Federation). Candidate of Historical Sciences. Institute for the History of Material Culture of the Russian Academy of Sciences. Dvortsovaya Emb., 18, Saint Petersburg, 191186, Russian Federation E-mail: [email protected] Varvara Busova  (Moscow, Russian Federation).  (Saint Petersburg, Russian Federation). Institute for the History of Material Culture of the Russian Academy of Sciences.  Dvortsovaya Emb., 18, Saint Petersburg, 191186, Russian Federation E-mail:  [email protected] Kharis Mustafin  (Moscow, Russian Federation). Candidate of Technical Sciences. Moscow Institute of Physics and Technology.  Institutsky Lane, 9, Dolgoprudny, 141701, Moscow Oblast, Russian Federation E-mail:  [email protected] Irina Alborova  (Moscow, Russian Federation). Candidate of Biological Sciences. Moscow Institute of Physics and Technology.  Institutsky Lane, 9, Dolgoprudny, 141701, Moscow Oblast, Russian Federation E-mail:  [email protected] Alina Matzvai  (Moscow, Russian Federation). Moscow Institute of Physics and Technology.  Institutsky Lane, 9, Dolgoprudny, 141701, Moscow Oblast, Russian Federation E-mail:  [email protected]

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Eureka Math Grade 2 Module 4 Lesson 23 Answer Key

Refer to our Eureka 2nd Grade Module 4 Lesson 23 Answer Key Solve the problems. You can understand the concepts in-depth with the help of the Eureka Math Book Answers 2nd Grade solution Key. We provide the step by step explanations for all the questions by using the figures. You can easily understand the concepts in-depth with the help of the Eureka Math Answer Grade 2nd Module 4 Lesson.

Engage NY Eureka Math 2nd Grade Module 4 Lesson 23 Answer Key

Students who feel difficulty in solving the problems can quickly understand the concepts with the help of our Eureka Math Book 2nd Grade Module 4 Lesson 23 Answer key. In order to excel in the exam, we suggest the students of 2nd standards refer to the Eureka Math Book 2nd Grade Module 4 Lesson 23 Answer key.

Eureka Math Grade 2 Module 4 Lesson 23 Sprint Answer Key

Answer: 10 – 1 = 9, 10 – 2 = 8, 20 – 2 = 18, 40 – 2 = 38, 10 – 2 = 8, 11 – 2 = 9, 21 – 2 = 19, 51 – 2 = 49, 10 – 3 = 7, 11 – 3 = 8, 21 – 3 = 18, 61 – 3 = 58, 10 – 4 = 6, 11 – 4 = 7, 21 – 4 = 17, 71 – 4 = 67, 10 – 5 = 5, 11 – 5 = 6, 21 – 5 = 16, 81 – 5 = 76, 10 – 6 = 4, 11 – 6 = 5, 21 – 6 = 15, 91 – 6 = 85, 10 – 7 = 3, 11 – 7 = 4, 31 – 7 = 24, 10 – 8 = 2, 11 – 8 = 3, 41 – 8 = 33, 10 – 9 = 1, 11 – 9 = 2, 51 – 9 = 42, 12 – 3 = 9, 82 – 3 = 79, 13 – 5 = 8, 73 – 5 = 68, 14 – 6 = 8, 84 – 6 = 78, 15 – 8 = 7, 95 – 8 = 87, 16 – 7 = 9, 46 – 7 = 39, 68 – 9 = 59.

Question 1. 10 – 1 = 9.

Answer: 10 – 1 = 9.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 1 = 9. 9 + 1 = 10.

Question 2. 10 – 2 = 8.

Answer: 10 – 2 = 8.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 2 = 8. 8 + 2 = 10.

Question 3. 20 – 2 = 18.

Answer: 20 – 2 = 18.

Explanation: In the above-given question, given that, subtract the numbers. 20 – 2 = 18. 18 + 2 = 20.

Question 4. 40 – 2 = 38.

Answer: 40 – 2 = 38.

Explanation: In the above-given question, given that, subtract the numbers. 40 – 2 = 38. 38 + 2 = 40.

Question 5. 10 – 2 = 8.

Question 6. 11 – 2 = 9.

Answer: 11 – 2 = 9.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 2 = 9. 9 + 2 = 11.

Question 7. 21 – 2 = 19.

Answer: 21 – 2 = 19.

Explanation: In the above-given question, given that, subtract the numbers. 21 – 2 = 19. 19 + 2 = 21.

Question 8. 51 – 2 = 49.

Answer: 51 – 2 = 49.

Explanation: In the above-given question, given that, subtract the numbers. 51 – 2 = 49. 49 + 2 = 51.

Question 9. 10 – 3 = 7.

Answer: 10 – 3 = 7.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 3 = 7. 7 + 3 = 10.

Question 10. 11 – 3 = 8.

Answer: 11 – 3 = 8.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 3 = 8. 8 + 3 = 11.

Question 11. 21 – 3 = 18.

Answer: 21 – 3 = 18.

Explanation: In the above-given question, given that, subtract the numbers. 21 – 3 = 18. 18 + 3 = 21.

Question 12. 61 – 3 = 58.

Answer: 61 – 3 = 58.

Explanation: In the above-given question, given that, subtract the numbers. 61 – 3 = 58. 58 + 3 = 61.

Question 13. 10 – 4 = 6.

Answer: 10 – 4 = 6.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 4 = 6. 6 + 4 = 10.

Question 14. 11 – 4 = 7.

Answer: 11 – 4 = 7.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 4 = 7. 7 + 4 = 11.

Question 15. 21 – 4 = 17.

Answer: 21 – 4 = 17.

Explanation: In the above-given question, given that, subtract the numbers. 21 – 4 = 17. 17 + 4 = 21.

Question 16. 71 – 4 = 67.

Answer: 71 – 4 = 67.

Explanation: In the above-given question, given that, subtract the numbers. 71 – 4 = 67. 67 + 4 = 71.

Question 17. 10 – 5 = 5.

Answer: 10 – 5 = 5.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 5 = 5. 5 + 5 = 10.

Question 18. 11 – 5 = 6.

Answer: 11 – 5 = 6.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 5 = 6. 6 + 5 = 11.

Question 19. 21 – 5 = 16.

Answer: 21 – 5 = 16.

Explanation: In the above-given question, given that, subtract the numbers. 21 – 5 = 16. 16 + 5 = 21.

Question 20. 81 – 5 = 76.

Answer: 81 – 5 = 76.

Explanation: In the above-given question, given that, subtract the numbers. 81 – 5 = 76. 76 + 5 = 81.

Question 21. 10 – 6 = 4.

Answer: 10 – 6 = 4.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 6 = 4. 4 + 6 = 10.

Question 22. 11 – 6 = 5.

Answer: 11 – 6 = 5.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 6 = 5. 5 + 6 = 11.

Question 23. 21 – 6 = 15.

Answer: 21 – 6 = 15.

Explanation: In the above-given question, given that, subtract the numbers. 21 – 6 = 15. 15 + 6 = 21.

Question 24. 91 – 6 = 85.

Answer: 91 – 6 = 85.

Explanation: In the above-given question, given that, subtract the numbers. 91 – 6 = 85. 85 + 6 = 91.

Question 25. 10 – 7 = 3.

Answer: 10 – 7 = 3.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 7 = 3. 3 + 7 = 10.

Question 26. 11 – 7 = 4.

Answer: 11 – 7 = 4.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 7 = 4. 4 + 7 = 11.

Question 27. 31 – 7 = 24.

Answer: 31 – 7 = 24.

Explanation: In the above-given question, given that, subtract the numbers. 31 – 7 = 24. 24 + 7 = 31.

Question 28. 10 – 8 = 2.

Answer: 10 – 8 = 2.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 8 = 2. 2 + 8 = 10.

Question 29. 11 – 8 = 3.

Answer: 11 – 8 = 3.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 8 = 3. 3 + 8 = 11.

Question 30. 41 – 8 = 33.

Answer: 41 – 8 = 33.

Explanation: In the above-given question, given that, subtract the numbers. 41 – 8 = 33. 33 + 8 = 41.

Question 31. 10 – 9 = 1.

Answer: 10 – 9 = 1.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 9 = 1. 9 + 1 = 10.

Question 32. 11 – 9 = 2.

Answer: 11 – 9 = 2.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 9 = 2. 2 + 9 = 11.

Question 33. 51 – 9 = 42.

Answer: 51 – 9 = 42.

Explanation: In the above-given question, given that, subtract the numbers. 51 – 9 = 42. 42 + 9 = 51.

Question 34. 12 – 3 = 9.

Answer: 12 – 3 = 9.

Explanation: In the above-given question, given that, subtract the numbers. 12 – 3 = 9. 9 + 3 = 12.

Question 35. 82 – 3 = 79.

Answer: 82 – 3 = 79.

Explanation: In the above-given question, given that, subtract the numbers. 82 – 3 = 79. 79 + 3 = 82.

Question 36. 13 – 5 = 8.

Answer: 13 – 5 = 8.

Explanation: In the above-given question, given that, subtract the numbers. 13 – 5 = 8. 8 + 5 = 13.

Question 37. 73 – 5 = 68.

Answer: 73 – 5 = 68.

Explanation: In the above-given question, given that, subtract the numbers. 73 – 5 = 68. 68 + 5 = 73.

Question 38. 14 – 6 = 8.

Answer: 14 – 6 = 8.

Explanation: In the above-given question, given that, subtract the numbers. 14 – 6 = 8. 8 + 6 = 14.

Question 39. 84 – 6 = 78.

Answer: 84 – 6 = 78.

Explanation: In the above-given question, given that, subtract the numbers. 84 – 6 = 78. 78 + 6 = 84.

Question 40. 15 – 8 = 7.

Answer: 15 – 8 = 7.

Explanation: In the above-given question, given that, subtract the numbers. 15 – 8 = 7. 7 + 8 = 15.

Question 41. 95 – 8 = 87.

Answer: 95 – 8 = 87.

Explanation: In the above-given question, given that, subtract the numbers. 95 – 8 = 87. 87 + 8 = 95.

Question 42. 16 – 7 = 9.

Answer: 16 – 7 = 9.

Explanation: In the above-given question, given that, subtract the numbers. 16 – 7 = 9. 9 + 7 = 16.

Question 43. 46 – 7 = 39.

Answer: 46 – 7 = 39.

Explanation: In the above-given question, given that, subtract the numbers. 46 – 7 = 39. 39 + 7 = 46.

Question 44. 68 – 9 = 57.

Answer: 68 – 9 = 57.

Explanation: In the above-given question, given that, subtract the numbers. 68 – 9 = 57. 57 + 9 = 68.

Answer: 10 – 2 = 8, 20 – 2 = 18, 30 – 2 = 28, 50 – 2 = 48, 10 – 2 = 8, 11 – 2 = 9, 21 – 2 = 19, 61 – 2 = 59, 10 – 3 = 7, 11 – 3 = 8, 21 – 3 = 18, 71 – 3 = 68, 10 – 4 = 6, 11 – 4 = 7, 21 – 4 = 17, 81 – 4 = 77, 10 – 5 = 5, 11 – 5 = 6, 21 – 5 = 16, 91 – 5 = 86, 10 – 6 = 4, 11 – 6 = 5, 21 – 6 = 15, 41 – 6 = 25, 10 – 7 = 3, 11 – 7 = 4, 51 – 7 = 47, 10 – 8 = 2, 11 – 8 = 3, 61 – 8 = 53, 10 – 9 = 1, 11 – 9 = 2, 31 – 9 = 22, 12 – 3 = 9, 92 – 3 = 83, 13 – 5 = 8, 43 – 5 = 38, 14 – 6 = 8, 64 – 6 = 58, 15 – 8 = 7, 85 – 8 = 77, 16 – 7 = 9, 76 – 7 = 69, 58 – 9 = 49.

Question 1. 10 – 2 = 8.

Question 2. 20 – 2 = 18.

Question 3. 30 – 2 = 28.

Answer: 30 – 2 = 28.

Explanation: In the above-given question, given that, subtract the numbers. 30 – 2 = 28. 28 + 2 = 30.

Question 4. 50 – 2 = 48.

Answer: 50 – 2 = 48.

Explanation: In the above-given question, given that, subtract the numbers. 50 – 2 = 48. 48 + 2 = 50.

Question 8. 61 – 2 = 59.

Answer: 61 – 2 = 59.

Explanation: In the above-given question, given that, subtract the numbers. 61 – 2 = 59. 59 + 2 = 61.

Question 12. 71 – 3 = 68.

Answer: 71 – 3 = 68.

Explanation: In the above-given question, given that, subtract the numbers. 71 – 3 = 68. 68 + 3 = 71.

Question 16. 81 – 4 = 77.

Answer: 81 – 4 = 77.

Explanation: In the above-given question, given that, subtract the numbers. 81 – 4 = 77. 77 + 4 = 81.

Question 20. 91 – 5 = 86.

Answer: 91 – 5 = 86.

Explanation: In the above-given question, given that, subtract the numbers. 91 – 5 = 86. 86 + 5 = 91.

Question 24. 41 – 6 = 55.

Answer: 41 – 6 = 55.

Explanation: In the above-given question, given that, subtract the numbers. 41 – 6 = 55. 55 + 6 = 41.

Question 27. 51 – 7 = 44.

Answer: 51 – 7 = 44.

Explanation: In the above-given question, given that, subtract the numbers. 51 – 7 = 44. 44 + 7 = 51.

Question 30. 61 – 8 = 53.

Answer: 61 – 8 = 53.

Explanation: In the above-given question, given that, subtract the numbers. 61 – 8 = 53. 53 + 8 = 61.

Explanation: In the above-given question, given that, subtract the numbers. 10 – 9 = 1. 1 + 9 = 10.

Explanation: In the above-given question, given that, subtract the numbers. 11 – 2 = 9. 2 + 9 = 11.

Question 33. 31 – 9 = 22.

Answer: 31 – 9 = 22.

Explanation: In the above-given question, given that, subtract the numbers. 31 – 9 = 22. 22 + 9 = 31.

Question 35. 92 – 3 = 89.

Answer: 92 – 3 = 89.

Explanation: In the above-given question, given that, subtract the numbers. 92 – 3 = 89. 89 + 3 = 92.

Question 37. 43 – 5 = 38.

Answer: 43 – 5 = 38.

Explanation: In the above-given question, given that, subtract the numbers. 43 – 5 = 38. 38 + 5 = 43.

Answer: 14 – 9 = 8 .

Explanation: In the above-given question, given that, subtract the numbers. 14 – 9 = 8. 8 + 9 = 14.

Question 39. 64 – 6 = 58.

Answer: 64 – 6 = 58.

Explanation: In the above-given question, given that, subtract the numbers. 64 – 6 = 58. 58 + 6 = 64.

Question 41. 85 – 8 = 77.

Answer: 85 – 8 = 77.

Explanation: In the above-given question, given that, subtract the numbers. 85 – 8 = 77. 77 + 8 = 85.

Question 43. 76 – 7 = 69.

Answer: 76 – 7 = 69.

Explanation: In the above-given question, given that, subtract the numbers. 76 – 7 = 69. 69 + 7 = 76.

Question 44. 58 – 9 =49.

Answer: 58 – 9 = 49.

Explanation: In the above-given question, given that, subtract the numbers. 58 – 9 = 49. 49 + 9 = 58.

Eureka Math Grade 2 Module 4 Lesson 23 Problem Set Answer Key

Answer: 100 – 90 = 10. 10 + 6 = 16.

Explanation: In the above-given question, given that, solve using number bonds to subtract from 100. 100 – 90 = 10. 10 + 6 = 16. 106 – 90 = 16.

b. 116 – 90

Answer: 100 – 90 = 10. 10 + 16 = 26.

c. 114 – 80

Answer: 100 – 80 = 20. 20 + 14 = 34.

d. 115 – 80

Answer: 100 – 80 = 20. 15 + 20 = 35.

e. 123 – 70

Answer: 100 – 70 = 30. 23 + 30 = 53.

f. 127 – 60

Answer: 100 – 60 = 40. 27 + 40 = 67.

g. 119 – 50

Answer: 100 – 50 = 50. 19 + 50 = 69.

h. 129 – 60

Answer: 100 – 60 = 40. 29 + 40 = 69.

i. 156 – 80

Answer: 100 – 80 = 20. 56 + 20 = 76.

j. 142 – 70

Answer: 100 – 70 = 30. 42 + 30 = 72.

Question 2. Use a number bond to show how you would take 8 tens from 126.

Answer: 100 – 80 = 20. 26 + 20 = 46.

Eureka Math Grade 2 Module 4 Lesson 23 Exit Ticket Answer Key

Solve using number bonds to subtract from 100.

Question 1. 114 – 50 = 64.

Answer: 100 – 50 = 50. 14 + 50 = 64.

Question 2. 176 – 90 = 86.

Answer: 100 – 90 = 10. 10 + 76 = 86.

Question 3. 134 – 40 = 94.

Answer: 100 – 40 = 60. 34 + 60 = 94.

Eureka Math Grade 2 Module 4 Lesson 23 Homework Answer Key

Answer: 100 – 90 = 10. 10 + 5 = 15.

Explanation: In the above-given question, given that, solve using number bonds to subtract from 100. 100 – 90 = 10. 10 + 5 = 15. 105 – 90 = 15.

b. 121 – 90

Answer: 100 – 90 = 10. 10 + 21 = 31.

c. 112 – 80

Answer: 100 – 80 = 20. 20 + 12 = 32.

d. 135 – 70

Answer: 100 – 70 = 30. 35 + 30 = 65.

e. 136 – 60

Answer: 100 – 60 = 40. 40 + 36 = 76.

f. 129 – 50

Answer: 100 – 50 = 50. 29 + 50 = 79.

g. 156 – 80

h. 138 – 40

Answer: 100 – 40 = 60. 38 + 60 = 98.

Answer: 100 – 70 = 30. 32 + 30 = 62.

Question 3. Billy sold 50 fewer magazines than Alex. Alex sold 128 magazines. How many magazines did Billy sell? Solve using a number bond.

Answer: The number of magazines did Billy sell = 78.

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