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 Multiplicative Inverse of a Number Reciprocal The reciprocal of x is . In other words, a reciprocal is a fraction flipped upside down. Multiplicative inverse means the same thing as reciprocal. For example, the multiplicative inverse (reciprocal) of 12 is and the multiplicative inverse (reciprocal) of is .   Note: The product of a number and its multiplicative inverse is 1. Observe that ·= 1.     See also Inverse