When you ask "What number is halfway between 7 and 156?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=156.
To find the number halfway between 7 and 156, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 156 into our formula, we get:
(7 + 156)/2 = 81.5
Thus, the number halfway between 7 and 156 is 81.5.
To check that our answer is correct, we subtract 7 from 81.5 and subtract 81.5 from 156 and compare the two numbers:
81.5 - 7 = 74.5
156 - 81.5 = 74.5
As you can see, the halfway number is 74.5 higher than 7 and 74.5 lower than 156. Therefore, our halfway between answer of 81.5 above is correct.
Halfway Between
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Halfway Between 7 and 157
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