When you ask "What number is halfway between 87 and 862?" 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=862.
To find the number halfway between 87 and 862, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 862 into our formula, we get:
(87 + 862)/2 = 474.5
Thus, the number halfway between 87 and 862 is 474.5.
To check that our answer is correct, we subtract 87 from 474.5 and subtract 474.5 from 862 and compare the two numbers:
474.5 - 87 = 387.5
862 - 474.5 = 387.5
As you can see, the halfway number is 387.5 higher than 87 and 387.5 lower than 862. Therefore, our halfway between answer of 474.5 above is correct.
Halfway Between
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