The mean is the same as average. You add up all the numbers in the set then divide it by how many numbers there are. for example: pretend the numbers are 4,2,7,5,2. to find the mean i add them all up. 139+2+7+5+2=155. now i divide. there are 5 numbers so 155 divided by 5 is 31. 31 is the mean.
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Add all the numbers together and divide by that total by the numbers. For example: 2 + 3+ 2+5 = 12 . There are 4 numbers ( 2, 3, 2, 5) So 12 divided by 4 = 3. The mean is 3.
Look in your math book you will find the answer!!!
easy you can use a calculator to find that out
Compensation in math means, adding and subtracting the same number to make the sum or difference easier to find.
In other words, do the math in your head, not on paper.
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