When you ask "What number is halfway between 81 and 175?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=81 and Y=175.
To find the number halfway between 81 and 175, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 175 into our formula, we get:
(81 + 175)/2 = 128
Thus, the number halfway between 81 and 175 is 128.
To check that our answer is correct, we subtract 81 from 128 and subtract 128 from 175 and compare the two numbers:
128 - 81 = 47
175 - 128 = 47
As you can see, the halfway number is 47 higher than 81 and 47 lower than 175. Therefore, our halfway between answer of 128 above is correct.
Halfway Between
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Halfway Between 81 and 176
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