## Engage NY Eureka Math 1st Grade Module 4 Lesson 17 Answer Key

### Eureka Math Grade 1 Module 4 Lesson 17 Core Addition Fluency Review Answer Key

Core Addition Fluency Review: Missing Addends

Question 1.

5 + ___ = 5

Answer: 0

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

5 + x = 5

x = 5 – 5

x = 0

Thus the missing addend is 0.

Question 2.

4 + ___ = 5

Answer: 1

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

4 + x = 5

x = 5 – 4

x = 1

Thus the missing addend is 1.

Question 3.

2 + ___ = 5

Answer: 3

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

2 + x = 5

x = 5 – 2

x = 3

Thus the missing addend is 3.

Question 4.

3 + ___ = 5

Answer: 2

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

3 + x = 5

x = 5 – 3

x = 2

Thus the missing addend is 2.

Question 5.

0 + ___ = 5

Answer: 5

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

0 + x = 5

x = 5

Thus the missing addend is 5.

Question 6.

1 + ___ = 5

Answer: 4

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

1 + x = 5

x = 5 – 1

x = 4

Thus the missing addend is 4.

Question 7.

1 + ___ = 6

Answer: 5

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

1 + x = 6

x = 6 – 1

x = 5

Thus the missing addend is 5.

Question 8.

0 + ___ = 6

Answer: 6

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

0 + x = 6

x = 6

Thus the missing addend is 6.

Question 9.

6 + ___ = 6

Answer: 0

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

6 + x = 6

x = 6 – 6

x = 0

Thus the missing addend is 0.

Question 10.

5 + ___ = 6

Answer: 1

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

5 + x = 6

x = 6 – 5

Thus the missing addend is 1.

Question 11.

3 + ___ = 6

Answer: 3

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

3 + x = 6

x = 6 – 3

x = 3

Thus the missing addend is 3.

Question 12.

4 + ___ = 6

Answer: 2

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

4 + x = 6

x = 6 – 4

Thus the missing addend is 2.

Question 13.

2 + ___ = 6

Answer: 4

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

2 + x = 6

x = 6 – 2

Thus the missing addend is 4.

Question 14.

2 + ___ = 7

Answer: 5

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

2 + x = 7

x = 7 – 2

x = 5

Thus the missing addend is 5.

Question 15.

5 + ___ = 7

Answer: 2

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

5 + x = 7

x = 7 – 5

x = 2

Thus the missing addend is 2.

Question 16.

6 + ___ = 7

Answer: 1

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

6 + x = 7

x = 7 – 6

Thus the missing addend is 1.

Question 17.

1 + ___ = 7

Answer: 6

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

1 + x = 7

x = 7 – 1

x = 6

Thus the missing addend is 6.

Question 18.

0 + ___ = 7

Answer: 7

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

0 + x = 7

x = 7

Thus the missing addend is 7.

Question 19.

7 + ___ = 7

Answer: 0

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

7 + x = 7

x = 7 – 7

Thus the missing addend is 0

Question 20.

3 + ___ = 7

Answer: 4

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

3 + x = 7

x = 7 – 3

Thus the missing addend is 4.

Question 21.

4 + ___ = 7

Answer: 3

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

4 + x = 7

x = 7 – 4

x = 3

Thus the missing addend is 3.

Question 22.

4 + ___ = 8

Answer: 4

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

4 + x = 8

x = 8 – 4

x = 4

Thus the missing addend is 4.

Question 23.

5 + ___ = 8

Answer: 3

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

5 + x = 8

x = 8 – 5

Thus the missing addend is 3.

Question 24.

6 + ___ = 8

Answer: 2

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

6 + x = 8

x = 8 – 6

x = 2

Thus the missing addend is 2.

Question 25.

2 + ___ = 8

Answer: 6

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x.

2 + x = 8

x = 8 – 2

x = 6

Thus the missing addend is 6.

Question 26.

3 + ___ = 8

Answer: 5

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

3 + x = 8

x = 8 – 3

x = 5

Thus the missing addend is 5.

Question 27.

0 + ___ = 8

Answer: 8

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

0 + x = 8

x = 8

Thus the missing addend is 8.

Question 28.

8 + ___ = 8

Answer: 0

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

8 + x = 8

x = 8 – 8

Thus the missing addend is 0.

Question 29.

7 + ___ = 8

Answer: 1

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

7 + x = 8

x = 8 – 7

x = 1

Thus the missing addend is 1.

Question 30.

1 + ___ = 8

Answer: 7

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

1 + x = 8

x = 8 – 1

x = 7

Thus the missing addend is 7.

Question 31.

9 + ___ = 9

Answer: 0

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

9 + x = 9

x = 9 – 9

x = 0

Thus the missing addend is 0.

Question 32.

0 + ___ = 9

Answer: 9

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

0 + x = 9

x = 9

Thus the missing addend is 9.

Question 33.

1 + ___ = 9

Answer: 8

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

1 + x = 6

x = 6 – 1

x = 5

Thus the missing addend is 5.

Question 34.

2 + ___ = 9

Answer: 7

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

2 + x = 9

x = 9 – 2

x = 7

Thus the missing addend is 7.

Question 35.

7 + ___ = 9

Answer: 2

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

7 + x = 9

x = 9 – 7

Thus the missing addend is 2.

Question 36.

6 + ___ = 9

Answer: 3

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

6 + x = 9

x = 9 – 6

x = 3

Thus the missing addend is 3.

Question 37.

5 + ___ = 9

Answer: 4

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

5 + x = 9

x = 9 – 5

x = 4

Thus the missing addend is 4.

Question 38.

3 + ___ = 9

Answer: 6

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

3 + x = 9

x = 9 – 3

x = 6

Thus the missing addend is 6.

Question 39.

4 + ___ = 9

Answer: 5

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

4 + x = 9

x = 9 – 4

x = 5

Thus the missing addend is 5.

Question 40.

4 + ___ = 10

Answer: 6

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

4 + x = 10

x = 10 – 4

x = 6

Thus the missing addend is 6.

Question 41.

5 + ___ = 10

Answer: 5

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

5 + x = 10

x = 10 – 5

Thus the missing addend is 5.

Question 42.

6 + ___ = 10

Answer: 4

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

6 + x = 10

x = 10 – 6

x = 4

Thus the missing addend is 4.

Question 43.

3 + ___ = 10

Answer: 7

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

3 + x = 10

x = 10 – 3

x = 7

Thus the missing addend is 7.

Question 44.

1 + ___ = 10

Answer: 9

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

1 + x = 10

x = 10 – 1

x = 9

Thus the missing addend is 9.

Question 45.

2 + ___ = 10

Answer: 8

Explanation:

Addition fluency is nothing but finding the sum of two numbers quickly.

Let the missing addend be x

2 + x = 10

x = 10 – 2

x = 8

Thus the missing addend is 8.

### Eureka Math Grade 1 Module 4 Lesson 17 Problem Set Answer Key

Solve the problems by drawing quick tens and ones or a number bond.

Question 1.

25 + 1 = _______

Answer: 26

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 25 and 1 are the parts of the number and 26 is the whole part.

Question 2.

25 + 10 = _______

Answer: 35

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 25 and 10 are the parts of the number and 35 is the whole part.

Question 3.

15 + 4 = _______

Answer: 19

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 15 and 4 are the parts of the number and 19 is the whole part.

Question 4.

15 + 20 = _______

Answer: 35

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 15 and 20 are the parts of the number and 35 is the whole part.

Question 5.

16 + 7 = _______

Answer: 23

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 16 and 7 are the parts of the number and 23 is the whole part.

Question 6.

26 + 7 = _______

Answer: 33

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 26 and 7 are the parts of the number and 33 is the whole part.

Question 7.

23 + 7 = _______

Answer: 30

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 23 and 7 are the parts of the number and 30 is the whole part.

Question 8.

33 + 7 = _______

Answer: 40

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 33 and 7 are the parts of the number and 40 is the whole part.

Question 9.

16 + 20 = _______

Answer: 36

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 16 and 20 are the parts of the number and 36 is the whole part.

Question 10.

6 + 24 = _______

Answer: 30

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 6 and 24 are the parts of the number and 30 is the whole part.

Question 11.

Try more problems with a partner. Use your personal white board to help you solve.

a. 4 + 26

b. 28 + 4

c. 32 + 7

d. 20 + 18

e. 9 + 23

f. 9 + 27

Answer:

a. 4 + 26 = 30

b. 28 + 4 = 32

c. 32 + 7 = 39

d. 20 + 18 = 38

e. 9 + 23 = 32

f. 9 + 27 = 36

Choose one problem you solved using the number bond, and be ready to discuss.

Answer:

6 + 24 = _______

Answer: 30

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 6 and 24 are the parts of the number and 30 is the whole part.

### Eureka Math Grade 1 Module 4 Lesson 17 Exit Ticket Answer Key

Find the totals using quick ten drawings or number bonds.

Question 1.

17 + 8 = _______

Answer: 25

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 17 and 8 are the parts of the number and 25 is the whole part.

Question 2.

28 + 7 = _______

Answer: 35

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 28 and 7 are the parts of the number and 35 is the whole part.

Question 3.

24 + 10 = _______

Answer: 34

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 24 and 10 are the parts of the number and 34 is the whole part.

Question 4.

19 + 20 = _______

Answer: 39

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 19 and 20 are the parts of the number and 39 is the whole part.

### Eureka Math Grade 1 Module 4 Lesson 17 Homework Answer Key

Use quick ten drawings or number bonds to make true number sentences.

Question 1.

13 + 20 = _______

Answer: 33

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 13 and 20 are the parts of the number and 33 is the whole part.

Question 2.

23 + 6 = _______

Answer: 29

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 23 and 6 are the parts of the number and 29 is the whole part.

Question 3.

10 + 23 = _______

Answer: 33

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 10 and 23 are the parts of the number and 33 is the whole part.

Question 4.

28 + 6 = _______

Answer: 34

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 28 and 6 are the parts of the number and 34 is the whole part.

Question 5.

26 + 7 = _______

Answer: 33

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 26 and 7 are the parts of the number and 33 is the whole part.

Question 6.

20 + 17 = _______

Answer: 37

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 20 and 17 are the parts of the number and 37 is the whole part.

Question 7.

How did you solve Problem 5? Why did you choose to solve it that way?

Answer: I solved the 5th problem by using the number bond. Because one can instantly tell the answer without the need for the actual calculation.

Solve using quick ten drawings or number bonds.

Question 8.

23 + 9 = _______

Answer: 32

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 23 and 9 are the parts of the number and 32 is the whole part.

Question 9.

27 + 7 = _______

Answer: 34

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 27 and 7 are the parts of the number and 34 is the whole part.

Question 10.

24 + 10 = _______

Answer: 34

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 24 and 10 are the parts of the number and 34 is the whole part.

Question 11.

20 + 18 = _______

Answer: 38

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 20 and 18 are the parts of the number and 38 is the whole part.

Question 12.

28 + 9 = _______

Answer: 37

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 28 and 9 are the parts of the number and 37 is the whole part.

Question 13.

29 + 9 = _______

Answer: 38

Explanation:

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 29 and 9 are the parts of the number and 38 is the whole part.

Question 14.

How did you solve Problem 11? Why did you choose to solve it that way?

Answer: I solved the problem 11 by using the number bond method.

A number bond is a simple addition of two numbers that add up to give the sum. Number bonds help us to understand that a whole number is made up of parts. These parts could be in different proportions.

Here 20 and 18 are the parts of the number and 38 is the whole part.

So, the sum of 20 and 18 is 38.