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## Go Math Grade 3 Chapter 3 Understand Multiplication Extra Practice Answer Key

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### Common Core – Page No. 63000

**Lesson 3.1**

**Draw equal groups. Skip count to find how many.**

Question 1.

2 groups of 4 ______

Answer:

8

Explanation:

Draw 4 counters in each group.

There are 2 equal groups.

skip count by 4 until you say 2 numbers.

There are 2 equal groups with 4 counters in each group.

So, there are 8 counters in all.

Question 2.

4 groups of 3 ______

Answer:

12

Explanation:

Draw 3 counters in each group.

There are 4 equal groups.

skip count by 3 until you say 4 numbers.

There are 4 equal groups with 3 counters in each group.

So, there are 12 counters in all.

**Lesson 3.2**

**Draw a quick picture to show the equal groups. Then write related addition and multiplication sentences.**

Question 3.

2 groups of 5

______ + ______ = ______

______ × ______ = ______

Answer:

5 + 5 = 10

2 x 5 = 10

Explanation:

**Addition Sentence**

Draw 5 counters in each group.

There are a total of 2 groups.

Now, the addition sentence is 5 + 5 = 10.

**Multiplication sentence**

Draw 5 counters in each circle or group.

Since there is the same number of counters in each group, multiply counters and groups to find how many there are altogether.

2 x 5 = 10.

factor x factor = product

Question 4.

3 groups of 2

______ + ______ + ______ = ______

______ × ______ = ______

Answer:

2 + 2 + 2 = 6

3 x 2 = 6

Explanation:

**Addition Sentence**

Draw 2 counters in each group.

There are a total of 3 groups.

Now, the addition sentence is 2 + 2 + 2 = 6

**Multiplication sentence**

Draw 2 counters in each circle or group.

Since there is the same number of counters in each group, multiply groups and counters to find how many there are altogether.

3 x 2 = 6.

factor x factor = product

**Lesson 3.3**

**1. Draw jumps on the number line to show 3 groups of 6.**

**Find the product.**

Question 5.

3 × 6 = ______

Answer:

Explanation:

3 x 6 = 18

**Write the multiplication sentence the number line shows.**

Question 6.

______ × ______ = ______

Answer:

4 x 3 = 12

Explanation:

1 jump on the number is considered as 1 group.

There are 3 jumps on a number line. So, there are 3 groups.

The length of each jump is 4.

Begin at 0. Skip count by 3’s.

Multiply 4 x 3 = 12.

### Common Core – Page No. 64000

**Lesson 3.4**

Question 1.

Destiny placed her hair ribbons in 3 groups of 5 on her dresser. How many hair ribbons in all does Destiny have? Draw a diagram to solve.

______ hair ribbons

Answer:

15 hair ribbons

Explanation:

3 groups of 5

Draw 3 counters (hair ribbons) in each group.

There are 5 equal groups (dresser).

We skip count by 3’s until you say 5 numbers (3,6,9,12,15)

There are 15 hair ribbons in all.

**Lesson 3.5**

**Draw an array to find the product.**

Question 2.

2 × 7 = ______

Answer:

2 x 7 = 14

Explanation:

2 x 7 = 14

Question 3.

2 × 6 = ______

Answer:

2 x 6 = 12

Explanation:

2 x 6 = 12

**Lesson 3.6**

**Write a multiplication sentence for the model. Then use the Commutative Property of Multiplication to write a related multiplication sentence.**

Question 4.

□□□□□

□□□□□

□□□□□

□□□□□

______ × ______ = ______

______ × ______ = ______

Answer:

4 x 5 = 20

5 x 4 = 20

Explanation:

The given image has 4 rows and 5 columns of square boxes. So, multiplication = 4 x 5. Using Commutative Property of Multiplication 4 x 5 = 5 x 4.

Question 5.

______ × ______ = ______

______ × ______ = ______

Answer:

Explanation:

**Lesson 3.7**

**Find the product.**

Question 6.

6 × 0 = ______

Answer:

0

Explanation:

The Zero Property of Multiplication states that the product of zero and any number is zero. So, 6 x 0 = 0.

Question 7.

5 × 1 = ______

Answer:

5

Explanation:

Use Commutative Property of Multiplication: 5 x 1 = 1 x 5.

The Identity Property of Multiplication states that the product of any number and 1 is that number. 5 x 1 = 5.

Question 8.

0 × 9 = ______

Answer:

0

Explanation:

The Zero Property of Multiplication states that the product of zero and any number is zero. So, 0 x 9 = 0.

Question 9.

1 × 8 = ______

Answer:

8

Explanation:

The Identity Property of Multiplication states that the product of any number and 1 is that number. 1 x 8 = 8.

Question 10.

1 × 4 = ______

Answer:

4

Explanation:

The Identity Property of Multiplication states that the product of any number and 1 is that number. 1 x 4 = 4.

Question 11.

9 × 1 = ______

Answer:

9

Explanation:

Use Commutative Property of Multiplication: 9 x 1 = 1 x 9.

The Identity Property of Multiplication states that the product of any number and 1 is that number. 9 x 1 = 9.

Question 12.

1 × 0 = ______

Answer:

0

Explanation:

The Zero Property of Multiplication states that the product of zero and any number is zero.

So, 1 x 0 = 0.

Question 13.

7 × 0 = ______

Answer:

0

Explanation:

The Zero Property of Multiplication states that the product of zero and any number is zero.

So, 7 x 0 = 0.

### Conclusion

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