When you ask "What number is halfway between 87 and 272?" 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=272.
To find the number halfway between 87 and 272, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 272 into our formula, we get:
(87 + 272)/2 = 179.5
Thus, the number halfway between 87 and 272 is 179.5.
To check that our answer is correct, we subtract 87 from 179.5 and subtract 179.5 from 272 and compare the two numbers:
179.5 - 87 = 92.5
272 - 179.5 = 92.5
As you can see, the halfway number is 92.5 higher than 87 and 92.5 lower than 272. Therefore, our halfway between answer of 179.5 above is correct.
Halfway Between
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Halfway Between 87 and 273
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