Multiplying a number by its reciprocal (the "multiplicative inverse") is always one.

Example: 8 × (1/8) = 1

**a × (1/a) = 1**Example: 8 × (1/8) = 1

*But not when the number is 0 because 1/0 is undefined!*
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Example: 8 × (1/8) = 1

Copyright © 2018 MathsIsFun.com