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Multiplying by powers of 10

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What are powers of 10? 100,000 10,000 1,000 100 10 1.1.01.001.0001.00001 GREATER THAN ONE LESS THAN ONE

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Look for a pattern. 1.24 x 1 = 1.24 1.24 x 10 = 12.4 1.24 x 100 = 124 1.24 x 1,000 = 1,240 1.24 x 10,000 = 12,400 The decimal point moves to the ______________ the same number of places as the number of zeros in the power of 10 greater than one. RIGHT

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Examples 0.35 x 100 = 8.5 x 1000 = 2.72 x 1000 = 5.98 x 10,000 = 35 8,500 2,720 59,800 00 0 00

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WRITE THIS DOWN! If the power of 10 is………….. MMMMORE THAN ONE Decimal moves RIGHT You are almost done!

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You are the BEST! Let’s test your knowledge! 0.25 x 100 = 6.55 x 100 = 0.9 x 10 = 3.48 x 10 = 25 655 9 9. 10. 11. HOMEWORK Page 143 #9-20, 52-53 34.8 12.

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Look for a pattern. 12.4 x.1 = 1.24 12.4 x.01 =.124 12.4 x.001 =.0124 12.4 x.0001 =.00124 12.4 x.00001 =.000124 The decimal point moves to the ______________ the same number of digits as there are after the decimal in the power of 10 less than one. LEFT

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Examples 5.4 x 0.01 = 93.6 x 0.1 = 7.84 x 0.001 = 0.3 x 0.0001 = 0.054 9.36 0.00784 0.00003 0 0 0 0 0 0....

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