All the solutions provided in **McGraw Hill Math Grade 5 Answer Key PDF Chapter 3 Lesson 7 Multiplying and Dividing by Powers of Ten** are as per the latest syllabus guidelines.

## McGraw-Hill Math Grade 5 Answer Key Chapter 3 Lesson 7 Multiplying and Dividing by Powers of Ten

**Multiply or divide by a power of ten.**

Question 1.

49 × 10^{3} = 49 × (__10 × 10 × 10__)

49 × 1000 = __49000__

Question 2.

49 × 10^{2} = 49 × (_____)

49 × 100 = __4900__

Answer:

49 × 10^{2} = 4900.

Explanation:

Given the expression is 49 × 10^{2} which is

= 49 × 10 × 10

= 4900.

Question 3.

525 ÷ 10^{1} = 525 ÷ ____

\(\frac{525}{10}\) = ____

Answer:

525 ÷ 10^{1} = 52.5.

Explanation:

Given the expression is 525 ÷ 10^{1} which is

= 525 ÷ 10

= 52.5.

Question 4.

525 ÷ 10^{3} = 525 ÷ (_____)

\(\frac{525}{1000}\) = ____

Answer:

525 ÷ 10^{3} = 0.525.

Explanation:

Given the expression is 525 ÷ 10^{3} which is

= 525 ÷ 10 × 10 × 10

= 525 ÷ 1000

= 0.525.

Question 5.

1024 ÷ 10^{3} = _____

Answer:

1024 ÷ 10^{3} = 1.024.

Explanation:

Given the expression is 1024 ÷ 10^{3} which is

= 1024 ÷ 10 × 10 × 10

= 1024 ÷ 1000

= 1.024.

Question 6.

1776 ÷ 10^{2} = _____

Answer:

1776 ÷ 10^{2} = 17.76.

Explanation:

Given the expression is 1776 ÷ 10^{2} which is

= 1776 ÷ 10 × 10

= 1776 ÷ 100

= 17.76

Question 7.

225 ÷ 10^{1} = _____

Answer:

225 ÷ 10^{1} = 22.5.

Explanation:

Given the expression is 225 ÷ 10^{1} which is

= 225 ÷ 10

= 22.5.

**Write the missing word or phrase.**

Question 8.

When you multiply by a power of ten, the ____________________ to the right of the 10 tells you how many times to multiply by 10. As the number becomes 10 times greater, the decimal point ___________

Answer:

When we multiply by a power of ten, the power to the right of the 10 tells you how many times to multiply by 10. As the number becomes 10 times greater, the decimal point right side.

Question 9.

When you divide by a _____________________ of ten, the exponent to the right of the 10 tells how many times you divide ______. As the number becomes 10 times ____, the decimal point ____.

Answer:

When you divide by a power of ten, the exponent to the right of the 10 tells how many times you divide by ten. As the number becomes 10 times lesser, the decimal point left side.