Multiplying Decimals by Powers of Ten (Part 1)

The video tutorial explains how to multiply whole numbers and mixed numbers by powers of 10. It highlights the difference in approach when dealing with decimals and demonstrates the step-by-step process of multiplying each part of a mixed number by 10. The tutorial also covers the concept of place value changes, showing how digits shift positions when multiplied by 10, and how this can be viewed as moving the decimal point.

What is the basic rule for multiplying a whole number by a power of 10?

• Add as many zeros to the left of the number as the power.

• Divide the number by 10.

• Multiply the number by 100.

• Add as many zeros to the right of the number as the power.

When multiplying a number with both whole and decimal parts by 10, what should you do with the decimal part?

• Divide each decimal digit by 10.

• Multiply each decimal digit by 10.

• Add a zero to the decimal part.

• Ignore the decimal part.

What is the result of multiplying 0.25 by 10?

• 25

• 0.250

• 2.5

• 0.025

How does multiplying by 10 affect the place value of digits in a number?

• The decimal point moves two places to the left.

• The decimal point moves two places to the right.

• Each digit moves one place to the left.

• Each digit moves one place to the right.

What happens to the decimal point when a number is multiplied by 10?

• It moves one place to the right.

• It disappears.

• It moves one place to the left.

• It stays in the same position.