Decimal Point Movement in Multiplication

This lesson covers decimal points in products, focusing on multiplying by 10 and powers of 10. It explains how multiplying by 10 affects place value and explores the relationship between fractions and powers of 10. The lesson also applies these concepts to solve problems involving decimals and fractions, emphasizing the importance of understanding place value changes when multiplying by fractions like 1/10 and 1/100.

What happens to the decimal point when you multiply a number by 10?

• It disappears.

• It stays the same.

• It moves one place to the left.

• It moves one place to the right.

How does dividing by 100 affect the decimal point?

• It stays the same.

• It moves one place to the right.

• It moves two places to the left.

• It moves two places to the right.

What is the result of multiplying 720 by 0.1?

• 720

• 0.72

• 7.2

• 72

How does multiplying by 1/10 affect the decimal point?

• Moves one place to the right

• Moves two places to the left

• Moves one place to the left

• Moves two places to the right

What is the result of 24.5 times 0.1?

• 245

• 0.245

• 24.5

• 2.45

If you multiply a number by 0.001, how many places does the decimal point move?

• Two places to the left

• Three places to the right

• One place to the right

• Three places to the left

Which of the following is equivalent to 0.6 times 0.5?

• 0.06

• 0.3

• 0.03

• 6 times 0.1

What is the decimal form of 3 times 2 divided by 1000?

• 0.006

• 6

• 0.6

• 0.06

Which expression is equivalent to 6 tenths times 5 tenths?

• 6 times 5 times 1/1

• 6 times 5 times 1/1000

• 6 times 5 times 1/10

• 6 times 5 times 1/100

What is the decimal representation of 7 times 5 divided by 1000?

• 0.035

• 0.35

• 3.5

• 35