When you ask "What number is halfway between 61 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=61 and Y=117.
To find the number halfway between 61 and 117, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 61 and 117 into our formula, we get:
(61 + 117)/2 = 89
Thus, the number halfway between 61 and 117 is 89.
To check that our answer is correct, we subtract 61 from 89 and subtract 89 from 117 and compare the two numbers:
89 - 61 = 28
117 - 89 = 28
As you can see, the halfway number is 28 higher than 61 and 28 lower than 117. Therefore, our halfway between answer of 89 above is correct.
Halfway Between
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Halfway Between 61 and 118
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