8.2 * / decimals

Introduction

When multiplying decimals, first multiply the numbers together, then add up the number of decimal places shifted from to the left.

For example, 1.2*10, if we multiply 12*10, we get 120. The decimal shift in total is 1. So the answer is 12

Another example, 1.2*1.2, if we multiply 12*12, we get 144. The decimal shift in total is 1+1=2. So the answer is 1.44

When dividing decimals, multiply the top and bottom by sets of 10 until there are no decimal places left.

For example, 3.6/1.2=36/12, multiply both top and bottom by 10. The answer is therefore 36/12=3.

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