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The exponent of a number says how many times to use that number in a multiplication.It is written as a small number to the right and above the base number.

In this example: 82 = 8 × 8 = 64
(The exponent "2" says to use the 8 two times in a multiplication.)

Other names for exponent are index or power.

2 3 2
A raised figure or symbol that shows how many times a quantity must be multiplied by itself, for example the figure 4 in a4