When you ask "What number is halfway between 87 and 730?" 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=730.
To find the number halfway between 87 and 730, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 730 into our formula, we get:
(87 + 730)/2 = 408.5
Thus, the number halfway between 87 and 730 is 408.5.
To check that our answer is correct, we subtract 87 from 408.5 and subtract 408.5 from 730 and compare the two numbers:
408.5 - 87 = 321.5
730 - 408.5 = 321.5
As you can see, the halfway number is 321.5 higher than 87 and 321.5 lower than 730. Therefore, our halfway between answer of 408.5 above is correct.
Halfway Between
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Halfway Between 87 and 731
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