Teachers and students can find this Eureka Book Answer Key for Grade 3 more helpful in raising students’ scores and supporting teachers to educate the students. Learning activities are the best option to educate elementary school kids and make them understand the basic mathematical concepts like addition, subtraction, multiplication, division, etc. Grade 3 elementary school students can find these fun-learning exercises for all math concepts through the Eureka Book.

## Engage NY Eureka Math 3rd Grade Module 3 Lesson 9 Answer Key

Students of Grade 3 can get a strong foundation by referring to the Eureka Math Book. It was developed by highly professional mathematics educators and the solutions prepared by them are in a concise manner for easy grasping. To achieve high scores in Grade 3, students need to solve all questions and exercises included in Eureka Grade 3 Book.

### Eureka Math Grade 3 Module 3 Lesson 9 Application Problems Answer Key

Solve the following pairs of problems. Circle the pairs where both problems have the same answer.

Question 1.
a. 7 + (6 + 4)
b. (7 + 6) + 4

a. 17.
b. 17.

Explanation:
In the above-given question,
given that,
a. 7 + (6 + 4)
6 + 4 = 10.
7 + 10 = 17.
b. (7 + 6) + 4.
7 + 6 = 13.
13 + 4 = 17. Question 2.
a. (3 × 2) × 4
b. 3 × (2 × 4)

a. 24.
b. 24.

Explanation:
In the above-given question,
given that,
a. 4 x (3 x 2)
3 x 2 = 6.
6 x 4 = 24.
b. (2 x 4) x 3.
2 x 4 = 8.
8 x 3 = 24. Question 3.
a. (2 × 1) × 5
b. 2 × (1 × 5)
a. 10.
b. 10.

Explanation:
In the above-given question,
given that,
a. 5 x (2 x 1)
2 x 1 = 2.
5 x 2 = 10.
b. (1 x 5) x 2.
5 x 1 = 5.
5 x 2 = 10. Question 4.
a. (4 × 2) × 2
b. 4 × (2 × 2)

a. 16.
b. 16.

Explanation:
In the above-given question,
given that,
a. 2 x (4 x 2)
4 x 2 = 8.
8 + 2 = 16.
b. (2 x 2) x 4.
2 x 2 = 4.
4 x 4 = 16. Question 5.
a. (3 + 2) × 5
b. 3 + (2 × 5)

a. 25.
b. 13.

Explanation:
In the above-given question,
given that,
a. 5 x (3 + 2)
3 + 2 = 5.
5 x 5 = 25.
b. (2 x 5) + 3.
2 x 5 = 10.
10 + 3 = 13.

Question 6.
a. (8 ÷ 2) × 2
b. 8 ÷ (2 × 2)

a. 8.
b. 2.

Explanation:
In the above-given question,
given that,
a. 2 x (8 / 2)
8 / 2 = 4.
2 x 4 = 8.
b. (2 x 2) / 8.
2 x 2 = 4.
8 / 4 = 2.

Question 7.
a. (9 – 5) + 3
b. 9 – (5 + 3)

a. 7.
b. 1.

Explanation:
In the above-given question,
given that,
a. 3 + (9 – 5)
9 – 5 = 4.
4 + 3 = 7.
b. (5 + 3) – 9.
5 + 3 = 8.
9 – 8 = 1.

Question 8.
a. (8 × 5) – 4
b. 8 × (5 – 4)

a. 36.
b. 8.

Explanation:
In the above-given question,
given that,
a. 4 – (8 x 5)
8 x 5 = 40.
40 – 4 = 36.
b. (5 – 4) x 8.
5 – 4 = 1.
1 x 8 = 8.

### Eureka Math Grade 3 Module 3 Lesson 9 Problem Set Answer Key

Question 1.
Use the array to complete the equation.
a. 3 × 12 =___36______

The number of rows = 3.
the number of columns = 12.

Explanation:
In the above-given question,
given that,
The number of rows = 3.
the number of columns = 12.
3 x 12 = 36.

b. (3 × 3) × 4
= __9___ × 4
= __36___

The number of rows = 3.
the number of columns = 12.

Explanation:
In the above-given question,
given that,
The number of rows = 3.
the number of columns = 12.
(3 x 3) x 4.
9 x 4 = 36.

c. 3 × 14 = __42___

The number of rows = 3.
the number of columns = 14.

Explanation:
In the above-given question,
given that,
The number of rows = 3.
the number of columns = 14.
3 x 14 = 42.

d. (___2__ × __3___) × 7
= ___6__ × __7___
= __42___

The number of rows = 3.
the number of columns = 14.

Explanation:
In the above-given question,
given that,
The number of rows = 3.
the number of columns = 14.
(2 x 3) x 7.
6 x 7 = 42.

Question 2.
Place parentheses in the equations to simplify. Then, solve. The first one has been done for you.
a. 3 x 16 = 3 x (2 x 8)
(3 x 2) x 8.
6 x 8 = 48.

Explanation:
In the above-given question,
given that,
the equation 3 x 16.
3 x ( 2 x 8 )
( 3 x 2 ) x 8.
6 x 8 = 48.

b. 2 x 14 = 2 x (2 x 7)
(2 x 2) x 7.
4 x 7 = 28.

Explanation:
In the above-given question,
given that,
the equation 2 x 14.
2 x ( 2 x 7 )
( 2 x 2 ) x 7.
4 x 7 = 28. c. 3 x 12 = 3 x (3 x 4)
(3 x 3) x 4.
9 x 4 = 36.

Explanation:
In the above-given question,
given that,
the equation 3 x 12.
3 x ( 3 x 4 )
( 3 x 3 ) x 4.
9 x 4 = 36. d. 3 x 14 = 3 x (2 x 7)
(3 x 2) x 7.
6 x 7 = 42.

Explanation:
In the above-given question,
given that,
the equation 3 x 14.
3 x ( 2 x 7 )
( 3 x 2 ) x 7.
6 x 7 = 42. e. 15 x 3 = 5 x 3 x 3
(5 x 3) x 3.
15 x 3 = 45.

Explanation:
In the above-given question,
given that,
the equation 3 x 15.
3 x ( 5 x 3 )
( 3 x 5 ) x 3.
15 x 3 = 45. f. 2 x 15 = 2 x (5 x 3)
(5 x 3) x 2.
15 x 2 = 30.

Explanation:
In the above-given question,
given that,
the equation 2 x 15.
2 x ( 5 x 3)
( 5 x 3 ) x 2.
15 x 2 = 30. Question 3.
Charlotte finds the answer to 16 × 2 by thinking about 8 × 4. Explain her strategy.

16 x 2 = 32.
8 x 4 = 32.

Explanation:
In the above-given question,
given that,
16 x 2 = 8 x 4.
16 x 2 = 32.
8 x 4 = 32.

### Eureka Math Grade 3 Module 3 Lesson 9 Exit Ticket Answer Key

18 x 3 = 54.

Explanation:
In the above-given question,
given that,
18 x 3 = 54.
3 x 18 = 54.

### Eureka Math Grade 3 Module 3 Lesson 9 Worksheet Answer Key

Question 1.
Use the array to complete the equation.
a. 3 × 16 = ____48_____

The number of rows = 3.
the number of columns = 16.

Explanation:
In the above-given question,
given that,
The number of rows = 3.
the number of columns = 16.
3 x 16 = 48.

b. (3 × __2__) × 8
= __6___ × ___8__
= __48___

The number of rows = 3.
the number of columns = 16.

Explanation:
In the above-given question,
given that,
The number of rows = 3.
the number of columns = 16.
(3 x 2) x 8.
6 x 8 = 48.

c. 4 × 18 = __72___

The number of rows = 4.
the number of columns = 18.

Explanation:
In the above-given question,
given that,
The number of rows = 4.
the number of columns = 18.
4 x 18 = 72.

d. (4 × __2__) × 9
= ___8__ × ___9__
= __72___

The number of rows = 4.
the number of columns = 18.

Explanation:
In the above-given question,
given that,
The number of rows = 4.
the number of columns = 18.
(4 x 2) x 9.
8 x 9 = 72.

Question 2.
Place parentheses in the equations to simplify and solve.
a. 14 x 3 = 2 x 7 x 3
(3 x 2) x 7.
6 x 7 = 42.

Explanation:
In the above-given question,
given that,
the equation 3 x 14.
3 x ( 2 x 7 )
( 3 x 2 ) x 7.
6 x 7 = 42. b. 12 x 3 = 4 x 3 x 3
(3 x 3) x 4.
9 x 4 = 36.

Explanation:
In the above-given question,
given that,
the equation 3 x 12.
3 x ( 3 x 4 )
( 3 x 3 ) x 4.
9 x 4 = 36. Question 3.
Solve. Then, match the related facts.  