
When you ask "What number is halfway between 87 and 901?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=87 and Y=901.

To find the number halfway between 87 and 901, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 901 into our formula, we get:
(87 + 901)/2 = 494
Thus, the number halfway between 87 and 901 is 494.
To check that our answer is correct, we subtract 87 from 494 and subtract 494 from 901 and compare the two numbers:
494 - 87 = 407
901 - 494 = 407
As you can see, the halfway number is 407 higher than 87 and 407 lower than 901. Therefore, our halfway between answer of 494 above is correct.
Halfway Between
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