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.
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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.
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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.
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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:
