# Eureka Math Grade 1 Module 1 Lesson 18 Answer Key

## 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.

Answer:

b.

Answer:

Question 2.
Are these number sentences true?

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

a. 3 + 1 = 2 + 2
____________

Answer:
3 + 1 = 2 + 2
4 = 4

b. 9 + 1 = 1 + 2
____________

Answer:
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
____________

Answer:
2 + 3 = 1 + 4
5 = 5

d. 5 + 1 = 4 + 2
____________

Answer:
5 + 1 = 4 + 2
6 = 6

e. 4 + 3 = 3 + 5
____________

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

f. 0 + 10 = 2 + 8
____________

Answer:
0 + 10 = 2 + 8
10 = 10

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

h. 3 + 7 = 2 + 6
____________

Answer:
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

Answer:
1 + 4 = 3 + 2

b. __ + 4 = 2 + 5

Answer:
1 + 4 = 2 + 5

c. __ + 5 = 6 + __

Answer:
2+ 5 = 6 + 1

d. 7 + __ = 8 + __

Answer:
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.

Answer:

b.

Answer:

### 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.

Answer:

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

Answer:

b.

Answer:

c.

Answer:

d.

Answer:

e.

Answer:

f.

Answer:

g.

Answer:

h.

Answer:

i.

Answer:

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

a. 8 + 0 = __ + 4

Answer:
8 + 0 = 4 + 4

b. 7 + 2 = 9 + __

Answer:
7 + 2 = 9 + 0

c. 5 + 2 = 4 + __

Answer:
5 + 2 = 4 + 3

d. 5 + __ = 6 + 0

Answer:
5 + 1 = 6 + 0

e. 5 + 4 = __ + 3

Answer:
5 + 4 = 6 + 3