When you ask "What number is halfway between 82 and 117?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=82 and Y=117.
To find the number halfway between 82 and 117, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 82 and 117 into our formula, we get:
(82 + 117)/2 = 99.5
Thus, the number halfway between 82 and 117 is 99.5.
To check that our answer is correct, we subtract 82 from 99.5 and subtract 99.5 from 117 and compare the two numbers:
99.5 - 82 = 17.5
117 - 99.5 = 17.5
As you can see, the halfway number is 17.5 higher than 82 and 17.5 lower than 117. Therefore, our halfway between answer of 99.5 above is correct.
Halfway Between
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Halfway Between 82 and 118
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