An exponent is a small, raised number (or symbol, or expression), as in:
53
ab
2xy
105+5
etc.
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82 = 8 × 8 = 64i think that's one (the little 2 is the exponent)
you do not do anything when you add numbers with exponents. you just figure out the answer. it is only if you multiply numbers with exponents, where you add the exponents..
Fractional exponents follow the same rules as integral exponents. Integral exponents are numbers raised to an integer power.
Add the exponents
The laws of exponents work the same with rational exponents, the difference being they use fractions not integers.