Eureka Math Grade 1 Module 1 End of Module Assessment Answer Key

Engage NY Eureka Math 1st Grade Module 1 End of Module Assessment Answer Key

Question 1.
There are 9 ducks swimming along in a line. There are 2 grown-up ducks, and the rest are babies. How many of the ducks are babies?
a. Explain your thinking using pictures, numbers, or words.

b. Write a number sentence that shows how you solved the problem.
_____________________________
a.
b. 9 – 2 = 7

Question 2.
Jennifer says you can use addition to solve subtraction.
She says to solve 9 – 6 = , just add 9 + 6.
Explain how Jennifer is right and wrong using words, pictures, and numbers.
Explination:
6 +       = 9
9 – 6 = 3
but 9 + 6 =15 not 3

Question 3.
Jeremy is confused about this problem: = 10 – 8. Be his teacher. Write two addition number sentences that might help him understand and solve it. Explain to Jeremy using words, pictures, or numbers, too.
10 – 8 =
Is same as
8 +        = 10

Question 4.
At the park, there are 6 friends playing baseball. Some more friends come. Now, there are 10 friends playing.
a. How many friends come to play with the first 6 friends? Explain your thinking using a math drawing, numbers, and words.

b. Write an addition sentence and a subtraction sentence to match the story.
___________________________ _____________________________

c. Write the addition sentence you found when solving the problem, and use the same 3 numbers to write 3 more number sentences:
___________________________ _____________________________
___________________________ _____________________________