When you ask "What number is halfway between 81 and 874?" 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=874.
To find the number halfway between 81 and 874, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 874 into our formula, we get:
(81 + 874)/2 = 477.5
Thus, the number halfway between 81 and 874 is 477.5.
To check that our answer is correct, we subtract 81 from 477.5 and subtract 477.5 from 874 and compare the two numbers:
477.5 - 81 = 396.5
874 - 477.5 = 396.5
As you can see, the halfway number is 396.5 higher than 81 and 396.5 lower than 874. Therefore, our halfway between answer of 477.5 above is correct.
Halfway Between
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Halfway Between 81 and 875
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