## 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