## Engage NY Eureka Math 2nd Grade Module 4 Mid Module Assessment Answer Key

### Eureka Math Grade 2 Module 4 Mid Module Assessment Answer Key

Question 1.

Solve. Show your mental math strategy.

a. 35 + 25 = ___60____

Answer:

35 + 25 = 60.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

35 – 5 = 30.

25 + 5 = 30.

30 + 30 = 60.

b. ____73___ = 27 + 46

Answer:

27 + 46 = 73.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

27 – 7 = 20.

46 + 7 = 53.

20 + 53 = 73.

c. _____92__ – 19 = 73

Answer:

92 – 19 = 73.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

73 + 19 = 92.

70 – 3 = 67.

19 + 3 = 22.

d. 89 – 52 = __37_____

Answer:

89 – 52 = 37.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

52 – 2 = 50.

37 + 2 = 39.

50 + 39 = 89.

e. 61 – ___29___ = 32

Answer:

61 – 29 = 32.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

61 – 1 = 60.

29 + 1 = 30.

61 – 29 = 32.

f. 75 – ____46___ = 29

Answer:

75 – 46 = 29.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

46 + 29 = 75.

75 – 46 = 29.

g.

Answer:

32 + 1 = 33.

33 + 10 = 43.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

32 + 1 = 33.

33 + 10 = 43.

h.

Answer:

60 – 1 = 59.

59 – 10 = 49.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

60 – 1 = 59.

59 – 10 = 49.

i.

Answer:

62 + 10 = 72.

72 + 1 = 73.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

62 + 10 = 72.

72 + 1 = 73.

Question 2.

Solve and show your work with a model.

a. 116 + 74 = ____190____

Model:

Answer:

74 + 2 = 76.

76 + 40 = 116.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

74 + 2 = 76.

76 + 40 = 116.

b. 147 + 28 = ___175______

Model:

Answer:

28 – 1 = 27.

27 + 120 = 147.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

28 – 1 = 27.

27 + 120 = 147.

c. 84 – 59 = ____25____

Model:

Answer:

84 – 59 = 25.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

84 – 59 = 25.

25 + 59 = 84.

d. 62 – 45 = ____17_____

Model:

Answer:

62 – 45 = 17.

Explanation:

In the above-given question,

given that,

show your mental math strategy.

62 – 45 = 17.

17 + 45 = 62.

Question 3.

Label each as true or false. Use a place value strategy to show how you know.

a. 23 – 14 = 14 + 23 ____False_____________

Answer:

23 – 14 = 9.

14 + 23 = 37.

Explanation:

In the above-given question,

given that,

use a place value strategy.

23 – 14 = 9.

14 + 23 = 37.

9 is not equal to 37.

b. 45 – 19 = 22 + 4 ___True______________

Answer:

45 – 19 = 26.

22 + 4 = 26.

Explanation:

In the above-given question,

given that,

use a place value strategy.

45 – 19 = 26.

22 + 4 = 26.

26 is equal to 26.

c. 93 – 56 = 84 – 37 _____False_____________

Answer:

93 – 56 = 37.

84 – 37 = 47.

Explanation:

In the above-given question,

given that,

use a place value strategy.

93 – 56 = 37.

84 – 37 = 47.

37 is not equal to 47.

d. 8 ones + 5 tens = 85 _______False___________

Answer:

8 ones + 5 tens = 58.

Explanation:

In the above-given question,

given that,

use a place value strategy.

8 ones + 5 tens.

8 ones = 8 x 1.

8 x 1 = 8.

5 tens = 5 x 10.

5 x 10 = 50.

50 + 8 = 58.

Question 4.

Sarah solved the word problem below.

a. Explain why Sarah’s addition strategy worked.

Answer:

47 + 29 = 76.

Explanation:

In the above-given question,

given that,

There are 47 cats in Cuddle’s pet shop.

There are 29 more dogs than cats.

47 + 29 = 76.

so the number of dogs in the cuddles = 76.

b. There are 18 fewer cats than birds. How many birds are in Cuddle’s Pet Shop? Use another place value strategy to find the answer. Show your work.

Answer:

The number of birds are in the cuddle’s pet shop = 29.

Explanation:

In the above-given question,

given that,

There are 18 fewer cats than birds.

There are 47 cats in Cuddle’s pet shop.

47 – 18 = 29.

so the number of birds in the cuddle’s pet shop = 29.