Say, find the reciprocal of 2
= 1/2
Reciprocal of 1/2
= 2
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prime factorization each number is a part of the whole
find each product
The mean of a number is the same as the number.
Three steps:1. Find the mean of all values2. Find the distance of each value from that mean (subtract the mean from each value, ignore minus signs)3. Then find the mean of those distances
Two numbers are needed to find a mean.