When you ask "What number is halfway between 8 and 137?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=137.
To find the number halfway between 8 and 137, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 137 into our formula, we get:
(8 + 137)/2 = 72.5
Thus, the number halfway between 8 and 137 is 72.5.
To check that our answer is correct, we subtract 8 from 72.5 and subtract 72.5 from 137 and compare the two numbers:
72.5 - 8 = 64.5
137 - 72.5 = 64.5
As you can see, the halfway number is 64.5 higher than 8 and 64.5 lower than 137. Therefore, our halfway between answer of 72.5 above is correct.
Halfway Between
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Halfway Between 8 and 138
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