## Engage NY Eureka Math 1st Grade Module 1 Lesson 18 Answer Key

### Eureka Math Grade 1 Module 1 Lesson 18 Problem Set Answer Key

Question 1.
Add. Color the balloons that match the number in the boy’s mind. Find expressions that are equal. Connect them below with = to make true number sentences.
a.

b.

Question 2.
Are these number sentences true?

If it is false, rewrite the number sentence to make it true.

a. 3 + 1 = 2 + 2
____________

3 + 1 = 2 + 2
4 = 4

b. 9 + 1 = 1 + 2
____________

9 + 1 = 1 + 2
9 + 1 = 1 + 2
10 not equal to 3
correct expression is
9 + 1 = 1 + 9
10 = 10

c. 2 + 3 = 1 + 4
____________

2 + 3 = 1 + 4
5 = 5

d. 5 + 1 = 4 + 2
____________

5 + 1 = 4 + 2
6 = 6

e. 4 + 3 = 3 + 5
____________

4 + 3 = 3 + 5
7 not equal to 8
correct expression is
4 + 3 = 3 + 4
7 = 7

f. 0 + 10 = 2 + 8
____________

0 + 10 = 2 + 8
10 = 10

g. 6 + 3 = 4 + 5
____________
6 + 3 = 4 + 5
9 = 9

h. 3 + 7 = 2 + 6
____________

3 + 7 = 2 + 6
10 not equal to 8
correct expression is
3 + 7 = 7 + 3
10 = 10

Question 3.
Write a number in the expression and solve.
a. 1 + __ = 3 + 2

1 + 4 = 3 + 2

b. __ + 4 = 2 + 5

1 + 4 = 2 + 5

c. __ + 5 = 6 + __

2+ 5 = 6 + 1

d. 7 + __ = 8 + __

7 + 1= 8 + 0

### Eureka Math Grade 1 Module 1 Lesson 18 Exit Ticket Answer Key

Find two ways to fix each number sentence to make it true.

a.

b.

### Eureka Math Grade 1 Module 1 Lesson 18 Homework Answer Key

Question 1.
The pictures below are not equal. Make the pictures equal, and write a true number sentence.

Question 2.
Circle the true number sentences, and rewrite the false sentences to make them true.
a.

b.

c.

d.

e.

f.

g.

h.

i.

Question 3.
Find the missing part to make the number of sentences true.

a. 8 + 0 = __ + 4

8 + 0 = 4 + 4

b. 7 + 2 = 9 + __

7 + 2 = 9 + 0

c. 5 + 2 = 4 + __