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multiplicative inverses

Two numbers whose product is 1. (ex. 2/3 x 3/2)

reciprocal

Another name for a multiplicative inverse.

multiple

The product of a number and a whole number. (ex. 3x1=3, 3x2=6, 3x3=9)

common multiples

Multiples that are shared by two or more numbers. For example, some common multiples of 4 and 6 are 0, 12, and 24.

least common multiple (LCM)

The least o the nonzero common multiples ot two or more numbers. The LCM of 4 and 6 is 12.

least common denominator

The least common multiple of the denominators of two or more fractions.