Multiply and divide decimals.

Lars gave the cashier $20 for an item that cost $8.30. How much change should he receive?

It rained 1.37 inches yesterday and 0.8 inches today. How much total rain fell over the past two days?

Multiply (4.13)(5.2)

Ignore the decimal points

Multiply like normal

Count digits after the decimals. There are three.

Put the decimal point 3 spaces to the left.

x 52413

668

052

0

62 74

2

1

4.13 5.2x

.

The # dividing into the other #

The # being divided

The answer

8.04.2

Find the value of 15.12 ÷ 3.6.

Move decimal in dividend so it is a whole number. Move the decimal the same amount of spaces in the divisor. 151.2 ÷ 36

Divide and move decimal up.

Isaiah developed 30 pictures from his digital camera. He was charged $2.70. What price did he pay per picture?

Divide.

Move decimal up and add zeros.

Isaiah paid $0.09 per picture.

Find the value of 5 ÷ 8.

Insert zeros into the problem after the decimal point.

Divide.

Find the value of each expression.

1. 5(0.72)

2. 0.25(1.9)

3. 19.6 ÷ 7

4. 7.2 ÷ 0.3

What part of dividing with decimals is the most challenging for you?