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.

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Presentation transcript:

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 x.

The # dividing into the other # The # being divided The answer

Find the value of ÷ 3.6.  Move decimal in dividend so it is a whole number. Move the decimal the same amount of spaces in the divisor ÷ 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) (1.9) ÷ ÷ 0.3

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