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Maths Exercices

Reciprocals and multiplicative inverses

If the product of two numbers is 1, the numbers are called reciprocals, or multiplicative inverses, of each other.

8 is the multiplicative inverse of , and is the multiplicative inverse of 8, because

Strategy. To find the reciprocal of a fraction, we invert the numerator and the denominator.

Find the reciprocal of .

The reciprocal of is because

All real numbers, except 0, have a multiplicative inverse.