Multiplying & Dividing by Powers of Ten

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Presentation transcript:

Multiplying & Dividing by Powers of Ten

126 x 10 = 1260 . When multiplying, move the decimal to the right. 1260 . When multiplying, move the decimal to the right. How many times? Count the zeros.

7.21 x 10 = 72 1 . When multiplying, move the decimal to the right. 72 1 . When multiplying, move the decimal to the right. How many times? Count the zeros.

.809 x 100 = 00 . 80 9 When multiplying, move the decimal to the right. How many times? Count the zeros.

61.3 x 1,000 = 000 61300 . When multiplying, move the decimal to the right. How many times? Count the zeros.

61.3 ÷ 1,000 = 000 0613 . When dividing, move the decimal to the left. How many times? Count the zeros.

3 3 326 x 10 = 326000 . When multiplying, move the decimal to the right. How many times? Look at the exponent.

5 5 .996 x 10 = . 99600 When multiplying, move the decimal to the right. How many times? Look at the exponent.

32.6 ÷ 10 = 326 . 2 2 When dividing, move the decimal to the left. How many times? Look at the exponent.

* When MULTIPLYING by a power of ten, move the decimal to the RIGHT. * When DIVIDING by a power of ten, move the decimal to the LEFT. * How many times? * Count the zeros or look at the exponent. 5 4.6 x 1,000 = 4.6 x 10 =