## 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____

35 + 25 = 60.

Explanation:
In the above-given question,
given that,
35 – 5 = 30.
25 + 5 = 30.
30 + 30 = 60.

b. ____73___ = 27 + 46

27 + 46 = 73.

Explanation:
In the above-given question,
given that,
27 – 7 = 20.
46 + 7 = 53.
20 + 53 = 73.

c. _____92__ – 19 = 73

92 – 19 = 73.

Explanation:
In the above-given question,
given that,
73 + 19 = 92.
70 – 3 = 67.
19 + 3 = 22.

d. 89 – 52 = __37_____

89 – 52 = 37.

Explanation:
In the above-given question,
given that,
52 – 2 = 50.
37 + 2 = 39.
50 + 39 = 89.

e. 61 – ___29___ = 32

61 – 29 = 32.

Explanation:
In the above-given question,
given that,
61 – 1 = 60.
29 + 1 = 30.
61 – 29 = 32.

f. 75 – ____46___ = 29

75 – 46 = 29.

Explanation:
In the above-given question,
given that,
46 + 29 = 75.
75 – 46 = 29.

g. 32 + 1 = 33.
33 + 10 = 43.

Explanation:
In the above-given question,
given that,
32 + 1 = 33.
33 + 10 = 43. h. 60 – 1 = 59.
59 – 10 = 49.

Explanation:
In the above-given question,
given that,
60 – 1 = 59.
59 – 10 = 49. i. 62 + 10 = 72.
72 + 1 = 73.

Explanation:
In the above-given question,
given that,
62 + 10 = 72.
72 + 1 = 73. Question 2.
Solve and show your work with a model.
a. 116 + 74 = ____190____
Model:

74 + 2 = 76.
76 + 40 = 116.

Explanation:
In the above-given question,
given that,
74 + 2 = 76.
76 + 40 = 116.

b. 147 + 28 = ___175______
Model:

28 – 1 = 27.
27 + 120 = 147.

Explanation:
In the above-given question,
given that,
28 – 1 = 27.
27 + 120 = 147.

c. 84 – 59 = ____25____
Model:

84 – 59 = 25.

Explanation:
In the above-given question,
given that,
84 – 59 = 25.
25 + 59 = 84.

d. 62 – 45 = ____17_____
Model:

62 – 45 = 17.

Explanation:
In the above-given question,
given that,
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_____________

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______________

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_____________

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___________

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.

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. 