Khan Academy

Supporting grades: 8

Description: For any base a and any integer exponents n and m, (a^n)⋅(a^m)= a^(n + m). For any nonzero base, (a^n)/(a^m) = a^(n - m). These are worked examples for using these properties with integer exponents. So, let's think about what four to the negative three times four to the fifth power is going to be equal to. And that's just a straight forward exponent property, but you can also think about why does that actually make sense. And so you're going to be left with five minus three, or negative three plus five fours.

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