Decimal Operations and Their Effects

This lesson covers decimal points in products, focusing on multiplying by 10 and understanding powers of 10 using fractions. It explains how multiplying by 10 affects place value and demonstrates the relationship between division and multiplication by fractions. The lesson also explores the application of these rules to various multiplication problems, emphasizing the movement of decimal places. Finally, it discusses multiples of powers of 10 and their equivalence in fraction form.

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

• It moves one place to the right.

• It moves one place to the left.

• It disappears.

• It stays the same.

How does dividing by 100 affect the decimal point?

• It moves one place to the right.

• It stays the same.

• It moves two places to the left.

• It moves two places to the right.

What is the decimal representation of 48 divided by 100?

• 0.048

• 48

• 4.8

• 0.48

What is the result of multiplying 720 by 0.1?

• 7.2

• 0.72

• 72

• 720

When multiplying by 1/10, what happens to the decimal point?

• It moves one place to the right.

• It moves one place to the left.

• It stays the same.

• It disappears.

What is the result of 36 times 0.1?

• 0.36

• 36

• 3.6

• 360

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

• One place to the left

• Three places to the left

• Four places to the left

• Two places to the left

Which of the following is equivalent to 0.6 times 0.5?

• 0.5

• 0.03

• 0.06

• 0.3

How do you express 0.07 as a fraction?

• 70/100

• 7/100

• 7/1000

• 7/10

What is the equivalent of 6 times 0.1?

• 60

• 6

• 0.06

• 0.6