Mastering Decimal Multiplication and Division with Powers of 10

Mrs. Smith teaches how to multiply and divide decimals by powers of ten. Multiplying by powers of ten shifts the decimal point to the right, while dividing shifts it to the left. The number of places the decimal moves depends on the power of ten used. The video includes examples and practice problems to reinforce these concepts.

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

• It moves one place to the right.

• It stays the same.

• It disappears.

• It moves one place to the left.

If you multiply 1.23 by 100, where will the decimal point move?

• One place to the right

• Two places to the left

• One place to the left

• Two places to the right

What is the result of multiplying 12.3 by 100?

• 1.23

• 123

• 12.3

• 1230

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

• To the left

• To the right

• It disappears

• It stays the same

What is 3.1 divided by 10?

• 0.31

• 31

• 3.01

• 0.031

How many places do you move the decimal point when dividing 31 by 100?

• Two places to the left

• One place to the right

• Two places to the right

• One place to the left

What is the result of 3.1 divided by 100?

• 0.031

• 0.31

• 31

• 3.01

When multiplying by powers of ten, which direction does the decimal point move?

• It disappears

• To the right

• To the left

• It stays the same

What is 15.2 times 10?

• 152

• 1520

• 1.52

• 15.02

If you divide 6.2 by 100, what is the result?

• 0.62

• 62

• 0.062

• 6.02