
When you ask "What number is halfway between 71 and 136?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=71 and Y=136.

To find the number halfway between 71 and 136, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 136 into our formula, we get:
(71 + 136)/2 = 103.5
Thus, the number halfway between 71 and 136 is 103.5.
To check that our answer is correct, we subtract 71 from 103.5 and subtract 103.5 from 136 and compare the two numbers:
103.5 - 71 = 32.5
136 - 103.5 = 32.5
As you can see, the halfway number is 32.5 higher than 71 and 32.5 lower than 136. Therefore, our halfway between answer of 103.5 above is correct.
Halfway Between
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Halfway Between 71 and 137
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