When you ask "What number is halfway between 78 and 113?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=78 and Y=113.
To find the number halfway between 78 and 113, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 113 into our formula, we get:
(78 + 113)/2 = 95.5
Thus, the number halfway between 78 and 113 is 95.5.
To check that our answer is correct, we subtract 78 from 95.5 and subtract 95.5 from 113 and compare the two numbers:
95.5 - 78 = 17.5
113 - 95.5 = 17.5
As you can see, the halfway number is 17.5 higher than 78 and 17.5 lower than 113. Therefore, our halfway between answer of 95.5 above is correct.
Halfway Between
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Halfway Between 78 and 114
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