When you ask "What number is halfway between 88 and 987?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=987.
To find the number halfway between 88 and 987, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 987 into our formula, we get:
(88 + 987)/2 = 537.5
Thus, the number halfway between 88 and 987 is 537.5.
To check that our answer is correct, we subtract 88 from 537.5 and subtract 537.5 from 987 and compare the two numbers:
537.5 - 88 = 449.5
987 - 537.5 = 449.5
As you can see, the halfway number is 449.5 higher than 88 and 449.5 lower than 987. Therefore, our halfway between answer of 537.5 above is correct.
Halfway Between
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Halfway Between 88 and 988
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