All the solutions provided in **McGraw Hill My Math Grade 5 Answer Key PDF Chapter 2 Multiply Whole Numbers** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 5 Answer Key Chapter 2 Multiply Whole Numbers

**Essential Question**

What strategies can be used to multiply whole numbers?

**Am I Ready?**

**Write all of the factors of each number.**

Question 1.

8 ___, ___, ___, ___

Answer:

1, 2, 4, 8

Explanation:

The factors of the given number are 1, 2, 4, and 8.

Question 2.

11 ____, ____

Answer:

1, 11

Explanation:

The factors of the given number are 1, 11.

Question 3.

6 ___, ___, ___, ___

Answer:

1, 2. 3, 6

Explanation:

The factors of the given number are 1, 2, 3, and 6.

Question 4.

15 ___, ___, ___, ____

Answer:

1, 3, 5, 15

Explanation:

The factors of the given number are 1, 3, 5, and 15.

Question 5.

32, ___, ___, ___, ___, ___, ___

Answer:

1, 2, 4, 8, 16, 32

Explanation:

The factors of the given number are 1, 2, 4, 8, 16, and 32.

Question 6.

10, ___, ___, ___, ____

Answer:

1, 2, 5, 10

Explanation:

The factors of the given number are 1, 2, 5, and 10.

**Write each repeated addition sentence as a multiplication sentence.**

Question 7.

5 + 5 + 5 + 5 = 20

__________

Answer:

5 × 4 = 20

Explanation:

The repeated addition sentence as a multiplication sentence is 5 × 4 = 20

Question 8.

8 + 8 + 8 = 24

Answer:

3 × 8 = 24

Explanation:

The repeated addition sentence as a multiplication sentence is 3 × 8 = 24

Question 9.

21 + 21 = 42

__________

Answer:

21 × 2 = 42

Explanation:

The repeated addition sentence as a multiplication sentence is 21 × 2 = 42

Question 10.

6 + 6 + 6 + 6 + 6 = 30

Answer:

5 × 6 = 30

Explanation:

The repeated addition sentence as a multiplication sentence is 5 × 6 = 30

Question 11.

13 + 13 + 13 = 39

Answer:

13 × 3 = 39

Explanation:

The repeated addition sentence as a multiplication sentence is 13 × 3 = 39

Question 12.

7 + 7 + 7 + 7 + 7 + 7 = 42

Answer:

7 × 6 = 42

Explanation:

The repeated addition sentence as a multiplication sentence is 7 × 6 = 42.

**Multiply.**

Question 13.

6 × 3 = ___

Answer:

18

Question 14.

1 × 8 = ___

Answer:

8

Question 15.

7 × 8 = ___

Answer:

56

Question 16.

4 × 10 = ___

Answer:

40

Question 17.

Nikki purchased three used books at a garage sale for $5 each. Find the total cost for all three books.

Answer:

$15

Explanation:

Nikki purchased three used books at a garage sale for $5 each.

Each book cost $5

The cost

for three books is 5 × 3

$15

**My Math Words**

**Review Vocabulary**

composite numbers prime numbers

**Making Connections**

Complete the chart below using the review words.

Answer:

Explain how you decided to categorize each set of numbers.

____________________________

____________________________

____________________________

**My Vocabulary Cards**

**Ideas for Use**

- Work with a partner to name the parts of speech of each word. Consult a dictionary to check your answers.
- Write a tally mark on each card every time you read the word in this chapter or use it in your writing. Try to use at least 2 to 3 tally marks for each card.

Numbers in a problem that are easy to work with mentally.

How can the meaning of compatible help you remember this definition?

To multiply a sum by a number, multiply each addend by the number, and add the products.

How can the meaning of the verb distribute help you remember this property?

A number obtained by raising a base number to an exponent

Add a suffix to power to form a new ward.

In a power, the number used as a factor.

Consult a dictionary to find another math-related definition of base. Describe that meaning in your own words.

A number raised to the third power.

Consult a dictionary to describe how cube used in geometry. Write that meaning.

In a power, the number of times the base is used as a factor.

What suffix can you add to exponent to make a word meaning growing or increasing very rapidly”? Name the word.

A number like 10, 100, 1,000 and so on. It is the result of using only 10 as a factor.

Is the number 30 a power of 10? Explain.

__________________

**My Vocabulary Cards**

**Ideas for Use**

- Use the back of the card to write or draw examples to help you answer the question.
- Use the blank cards to write notes about important concepts in this chapter, such as how powers of 10 apply to multiplication patterns.

A number raised to the second power.

Write a sentence using square as a noun.

__________________

__________________

A rule in mathematics that can be applied to all numbers

Write a sentence using property in a non-mathematical way.

**My Foldable**

**Foldables**

Follow the steps on the back to make your Foldable.

**Foldables**

**Study Organizer**

Answer: