When you ask "What number is halfway between 13 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=13 and Y=117.
To find the number halfway between 13 and 117, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 13 and 117 into our formula, we get:
(13 + 117)/2 = 65
Thus, the number halfway between 13 and 117 is 65.
To check that our answer is correct, we subtract 13 from 65 and subtract 65 from 117 and compare the two numbers:
65 - 13 = 52
117 - 65 = 52
As you can see, the halfway number is 52 higher than 13 and 52 lower than 117. Therefore, our halfway between answer of 65 above is correct.
Halfway Between
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Halfway Between 13 and 118
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