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Engage NY Eureka Math 3rd Grade Module 3 Lesson 20 Answer Key

Grade 3 Eureka Math Answer Key is provided by subject experts as per the Common Core curriculum. Grade 3 Eureka Math Solutions provided educates the primary school Kids on all Math concepts of the chapter efficiently. Eureka Math Grade 3 Textbook Answers makes it easy for kids to Grasp the Concepts as well as solve any problem from chapter Tests, Practice Tests, Performance tests, cumulative practice, etc.

Eureka Math Grade 3 Module 3 Lesson 20 Problem Set Answer Key

Question 1.
Use the chart to complete the equations. Then, solve. The first one has been done for you.
a.

(2 × 4) × 10
= (8 ones) × 10
= ___80____

8 x 10 = 80.

Explanation:
In the above-given question,
given that,
(2 x 4) x 10.
(8 ones) x 10.
80.

b.

2 × (4 × 10)
= 2 × (4 tens)
= ___80____

2 x 4 tens = 80.

Explanation:
In the above-given question,
given that,
2 x (4 x 10).
2 x (4 tens).
80.

c.

(3 × 5) × 10
= ( __15___ ones ) × 10
= ___150____

15 x 10 = 150.

Explanation:
In the above-given question,
given that,
(3 x 5) x 10.
(15 ones) x 10.
150.

d.

3 × (5 × 10)
= 3 × ( ___50___ tens)
= ___150____

3 x 5 tens = 150.

Explanation:
In the above-given question,
given that,
3 x (5 x 10).
3 x (5 tens).
150.

Question 2.
Place parentheses in the equations to find the related fact. Then, solve. The first one has been done for you.

2 x 20 = 40.
2 x 30 = 60.
3 x 30 = 90.
2 x 50 = 100.

Explanation:
In the above-given figure,
given that,
2 x 20 = 2 x (2 x 10).
(2 x 2) x 10.
4 x 10 = 40.
2 x 30 = 2 x (3 x 10).
(2 x 3) x 10.
6 x 10 = 60.
3 x 30 = 3 x (3 x 10).
(3 x 3) x 10.
9 x 10 = 90.
2 x 50 = 2 x (5 x 10).
(2 x 5) x 10.
10 x 10 = 100.

Question 3.
Gabriella solves 20 × 4 by thinking about 10 × 8. Explain her strategy.

20 x 4 = 80.

Explanation:
In the above-given question,
given that,
Gabriella solves 20 x 4 = 80.
This can also write it as 10 x 8 = 80.
20 x 4 = (2 x 10) x 4.
2 x (10 x 4).
2 x 40 = 80.

Eureka Math Grade 3 Module 3 Lesson 20 Exit Ticket Answer Key

Question 1.
Place parentheses in the equations to find the related fact. Then, solve.
a. 4 × 20 = 4 × 2 × 10
= 4 × 2 × 10
= __8____ × 10
= __80____

4 x 20 = 80.

Explanation:
In the above-given question,
given that,
4 x 20 = 4 x (2 x 10).
(4 x 2) x 10.
8 x 10.
80

b. 3 × 30 = 3 × 3 × 10
= 3 × 3 × 10
= __9___ × 10

3 x 30 = 90.

Explanation:
In the above-given question,
given that,
3 x 30 = 3 x (3 x 10).
(3 x 3) x 10.
9 x 10.
90

Question 2.
Jamila solves 20 × 5 by thinking about 10 tens. Explain her strategy.

20 x 5 = 100.

Explanation:
In the above-given question,
given that,
Jamila solves 20 x 5 by thinking about 10 tens.
20 x 5 = (2 x 10) x 5.
2 x (10 x 5).
2 x 50 = 100.
10 x 10 = 100.

Question 1.
Use the chart to complete the equations. Then, solve.
a.

(2 × 5) × 10
= (10 ones) × 10
= ___100____

8 x 10 = 80.

Explanation:
In the above-given question,
given that,
(2 x 5) x 10.
(10 ones) x 10.
100.

b.

2 × (5 × 10)
= 2 × (5 tens)
= ___100____

2 x 5 tens = 100.

Explanation:
In the above-given question,
given that,
2 x (5 x 10).
2 x (5 tens).
100.

c.

(4 × 5) × 10
= (__20___ ones) × 10
= ___200____

20 x 10 = 200.

Explanation:
In the above-given question,
given that,
(4 x 5) x 10.
(20 ones) x 10.
200.

d.

4 × (5 × 10)
= 4 × (__5__ tens)
= ___200____

4 x 5 tens = 200.

Explanation:
In the above-given question,
given that,
4 x (5 x 10).
4 x (5 tens).
200.

Question 2.
Solve, Place parentheses in (c) and (d) as needed to find the related fact.

3 x 20 = 60.
3 x 30 = 90.
3 x 40 = 120.
3 x 50 = 150.

Explanation:
In the above-given figure,
given that,
3 x 20 = 3 x (2 x 10).
(3 x 2) x 10.
6 x 10 = 60.
3 x 30 = 3 x (3 x 10).
(3 x 3) x 10.
9 x 10 = 90.
3 x 40 = 3 x (4 x 10).
(3 x 4) x 10.
12 x 10 = 120.
3 x 50 = 3 x (5 x 10).
(3 x 5) x 10.
15 x 10 = 150.

Question 3.
Danny solves 5 × 20 by thinking about 10 × 10. Explain his strategy.