All the solutions provided in **McGraw Hill My Math Grade 3 Answer Key PDF Chapter 5 Review **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 3 Chapter 5 Review Answer Key

**Vocabulary Check**

**Use the word bank to complete each sentence.**

array divide fact family inverse operations

partition related facts repeated subtraction

Question 1.

_____ are a set of basic facts using the same three numbers.

Answer:

Family fact

Explanation:

Family fact are a set of basic facts using the same three numbers.

Question 2.

An arrangement of objects into equal rows and equal columns is a(n) ____.

Answer:

An array

Explanation:

An arrangement of objects into equal rows and equal columns is an array.

Question 3.

A way to divide by sharing one object at a time until all the objects are gone is to _____

Answer:

partition-related facts.

Explanation:

A way to divide by sharing one object at a time until all the objects are gone is to partition related facts.

Question 4.

To ______ means to separate a number into equal groups, to find the number of groups, or find the number in each group.

Answer:

Divide

Explanation:

To divide means to separate a number into equal groups, to find the number of groups, or find the number in each group.

Question 5.

_____ is a way to subtract the same number over and over again until you reach 0.

Answer:

Repeated subtraction

Explanation:

Repeated subtraction is a way to subtract the same number over and over again until you reach 0.

Question 6.

Operations that are related are ____ because they undo each other.

Answer:

inverse operations

Explanation:

Operations that are related are inverse operations because they undo each other.

Question 7.

3 × 5 = 15, 5 × 3 = 15, 15 ÷ 5 = 3, and 15 ÷ 3 = 5 are the facts in the 3, 5, 15 _____.

Answer:

Question 8.

Write a division sentence in the space below. Label the dividend, divisor, and quotient.

Answer:

18 ÷ 9 =2

Explanation:

**Concept Check**

**Use counters to find how many are in each group.**

Question 9.

14 counters

2 equal groups

____ ÷ ____ = _____

____ in each group

Answer:

14 ÷ 2 = 7 in each group

Explanation:

Given,

14 counters

2 equal groups

14 ÷ 2 = 7

7 in each group.

Question 10.

25 counters

5 equal groups

____ ÷ ____ = _____

____ in each group

Answer:

5 in each group.

Explanation:

25 counters

5 equal groups

25 ÷ 5 = 5

5 in each group.

**Use repeated subtraction to divide.**

Question 11.

Answer:

2

Explanation:

First subtract equal groups of 2 repeatedly until you get to zero.

For 12 ÷ 6 = 2 start from 12.

You subtracted groups of three 2 times.

Question 12.

Answer:

5

Explanation:

First subtract equal groups of 5 repeatedly until you get to zero.

For 20 ÷ 4 = 5 start from 20.

You subtracted groups of three 5 times.

**Write the fact family for each set of numbers.**

Question 13.

Answer:

Equal groups.

Explanation:

The same amount of items will be there in equal groups. Therefore the figure has an equal group.

Question 14.

Answer:

Division Sentence.

Explanation:

Division sentence contains three numbers, a division sign and an equal sign.

**Write the fact family for each set of numbers.**

Question 15.

4, 7, 28

Answer:

Multiplication and Division family fact.

Explanation:

4 times 7 = 28

7 times 4 = 28

28 divided by 7 = 4

28 divided by 4 = 7

Question 16.

3, 9, 27

Answer:

Multiplication and Division of family fact

Explanation:

3 × 9 = 27

9 × 3 = 27

27 divided by 9 = 3

27 divided by 3 = 9

**Problem Solving**

Question 17.

Brandon’s dentist gave him 12 toothbrushes. Brandon wants to share them equally among himself and his 2 friends. How many toothbrushes will each person get? Write a division sentence.

Answer:

12 ÷ 3 = 4 toothbrushes.

Explanation:

Given,

No of toothbrushes = 12

Brandon shared them equally with himself and his friends = 3

12 ÷ 3 = 4 toothbrushes

Therefore each person gets 4 toothbrushes.

Question 18.

A teacher has 24 pencils. She keeps 4 and shares the others equally with 5 students. How many pencils did each student get?

Answer:

20 ÷ 5 = 4 pencils

Explanation:

Given,

No of pencils Teacher has = 24 pencils

Teacher kept = 4 pencils

So no of the pencils left are 24 – 4 = 20

The teacher shared an equal no of pencils with 5 students.

20 ÷ 5 = 4 pencils

Therefore each student needs 4 pencils.

Question 19.

Circle the number sentence that does not belong. Explain. Then write the missing number sentence.

Answer:

18 ÷ 2 = 9 is the sentence that does not belong here.

Explanation:

The number of sentence that does not belong is 18 ÷ 2 = 9.

3 × 6 = 18

6 × 3 = 18

18 ÷ 3 = 6

18 ÷ 6 = 3

**Test Practice**

Question 20.

Harper saved $30 from mowing lawns April through September. She saved an equal amount each month. How much money did Harper save each month?

A. $5

B. $6

C. $8

D. $10

Answer:

$5

Explanation:

Given,

Harper saved from mowing lawns April through September = $30

she saved an equal amount each month

From April to September means = 6

$30 ÷ 6 = $5

The amount of money harper saved each month is $5.

**Reflect**

Use what you learned about division to complete the graphic organizer.

Reflect on the ESSENTIAL QUESTION? Write your answer below.

Answer:

The number of sentence that does not belong is 18 ÷ 2 = 9.

Explanation:

It is called a multiplication and division fact family.

3 × 6 = 18

6 × 3 = 18

18 ÷ 3 = 6

18 ÷ 6 = 3