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If you have an integer, add a zero at the end. For example, 5 x 10 = 50, 123 x 10 = 1230.

More generally, to multiply by 10, you move the decimal point one position to the right. The decimal point can be implied; in the first example above, 5 is the same as 5.0, and 50 is the same as 50.0. However, this rule also allows you to easily multiply numbers with decimals by 10, for example, 2.24 x 10 = 22.4, or 1.5 x 10 = 15.

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Q: How do you multiply by 10?
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