When you ask "What number is halfway between 87 and 470?" 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=470.
To find the number halfway between 87 and 470, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 470 into our formula, we get:
(87 + 470)/2 = 278.5
Thus, the number halfway between 87 and 470 is 278.5.
To check that our answer is correct, we subtract 87 from 278.5 and subtract 278.5 from 470 and compare the two numbers:
278.5 - 87 = 191.5
470 - 278.5 = 191.5
As you can see, the halfway number is 191.5 higher than 87 and 191.5 lower than 470. Therefore, our halfway between answer of 278.5 above is correct.
Halfway Between
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Halfway Between 87 and 471
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