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

### Eureka Math Grade 1 Module 1 End of Module Assessment Task 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.

_____________________________

Answer: 7 ducks are babies

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.

Answer: Wrong,Jennifer is wrong

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.

Answer: 2

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:

___________________________ _____________________________

___________________________ _____________________________

Answer: 4 friends

a. 10 – 6 = 4

b. Addition sentence =6 + 4 = 10

Subtraction sentence =10 – 6 = 4

c. 6 + 4 = 10

10 = 6 + 4

4 + 6 = 10

10 = 4 + 6