Mastering Multiplication and Division by Powers of Ten

Mrs. Vandenberg teaches students how to multiply and divide numbers by 10, 100, and 1000. The video covers the movement of the decimal point to the right when multiplying and to the left when dividing, based on the number of zeros in the multiplier or divisor. The lesson includes examples and practice problems to reinforce these concepts, emphasizing mental math techniques. The video concludes with a review and encouragement to complete the video for full credit.

When multiplying a number by 10, which direction does the decimal point move?

• To the left

• To the right

• It disappears

• It stays the same

How many places does the decimal point move when multiplying by 1000?

• One place

• Two places

• Four places

• Three places

What is the product of 5.67 and 100?

• 5.67

• 56.7

• 567

• 5670

What is the result of multiplying 3.42 by 1000?

• 3420

• 342

• 34200

• 34.2

When dividing a number by 10, which direction does the decimal point move?

• To the left

• It stays the same

• To the right

• It disappears

How many places does the decimal point move when dividing by 100?

• Four places

• Three places

• Two places

• One place

What is the quotient of 83.1 divided by 10?

• 8.31

• 83.1

• 831

• 0.831

What is the result of dividing 7.03 by 100?

• 0.0703

• 7.03

• 0.703

• 70.3

What is the quotient of 809 divided by 1000?

• 0.809

• 8.09

• 80.9

• 809

What is the product of 47 and 1000?

• 4700

• 47000

• 470

• 470000