When you ask "What number is halfway between 87 and 494?" 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=494.
To find the number halfway between 87 and 494, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 494 into our formula, we get:
(87 + 494)/2 = 290.5
Thus, the number halfway between 87 and 494 is 290.5.
To check that our answer is correct, we subtract 87 from 290.5 and subtract 290.5 from 494 and compare the two numbers:
290.5 - 87 = 203.5
494 - 290.5 = 203.5
As you can see, the halfway number is 203.5 higher than 87 and 203.5 lower than 494. Therefore, our halfway between answer of 290.5 above is correct.
Halfway Between
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Halfway Between 87 and 495
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