Decimal Operations and Effects

This lesson covers the concept of powers of 10, focusing on multiplication and division by 10 and 100. It explains how moving the decimal point can simplify these operations, using examples to illustrate the equivalence of multiplying by fractions and dividing by whole numbers. The lesson also includes advanced examples with smaller decimals, reinforcing the concept of decimal movement.

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

• It disappears.

• It moves one place to the right.

• It stays the same.

• It moves one place to the left.

How does dividing a number 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.

When you multiply a number by 1000, how many places does the decimal point move?

• One place to the right

• Two places to the right

• Three places to the left

• Three places to the right

What is the result of dividing 48 by 100?

• 0.048

• 0.48

• 4.8

• 48

What is the result of multiplying 720 by 0.1?

• 7.2

• 72

• 720

• 0.72

If you multiply 36 by 0.01, what is the result?

• 0.36

• 3.6

• 36

• 0.036

What is the equivalent of multiplying by 0.1?

• Dividing by 10

• Multiplying by 10

• Dividing by 100

• Multiplying by 100

When you multiply 9.2 by 0.01, what is the result?

• 92

• 9.2

• 0.92

• 0.092

How does multiplying by 0.001 affect the decimal point?

• Moves it one place to the left

• Moves it three places to the right

• Moves it two places to the left

• Moves it three places to the left

What is the effect of multiplying a number by 0.001?

• It moves the decimal point one place to the right.

• It moves the decimal point three places to the right.

• It moves the decimal point two places to the right.

• It moves the decimal point three places to the left.