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.
