Multiplying Decimals by Powers of Ten (Part2)

The video tutorial explains how to multiply decimal numbers by powers of 10. It demonstrates the process by showing how multiplying 1.25 by 10^2 results in 125, and multiplying by 10^3 results in 1250. The general rule is to move the decimal point to the right as many places as the power of 10. If there are not enough digits, zeros are added as placeholders. Examples are provided to illustrate these concepts.

What happens to the decimal point when you multiply 1.25 by 100?

• It stays in the same position.

• It moves three places to the right.

• It moves two places to the right.

• It moves two places to the left.

When multiplying 1.25 by 1,000, what is the position of the digit '1' in the result?

• Ones place

• Hundreds place

• Thousands place

• Tens place

If you multiply a decimal by 10 to the power of 3, how many places does the decimal point move?

• One place to the right

• Two places to the right

• Four places to the right

• Three places to the right

What is the general rule for multiplying decimals by powers of 10?

• Move the decimal point to the left as many places as the power of 10.

• Add zeros to the left of the number.

• Move the decimal point to the right as many places as the power of 10.

• Subtract the power of 10 from the decimal.

In the example where a decimal is multiplied by 100, how many zeros are added as placeholders?

• Two zeros

• One zero

• No zeros

• Three zeros