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