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The rule is to move the digits of the number the same number of columns as the power of ten right in the place value table.

As this is not easy with pencil and paper, the rule is usually expressed in how it affects the position of the decimal point in the number, which is:

Move the decimal point the same number of digits as the power of ten to the left, inserting zeros if necessary. If the decimal point is not showing it is "hiding" after the units (or ones) digit at the right hand end.

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9y ago

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Q: What is the rule of division by a power of ten?
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