When you ask "What number is halfway between 87 and 722?" 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=722.
To find the number halfway between 87 and 722, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 722 into our formula, we get:
(87 + 722)/2 = 404.5
Thus, the number halfway between 87 and 722 is 404.5.
To check that our answer is correct, we subtract 87 from 404.5 and subtract 404.5 from 722 and compare the two numbers:
404.5 - 87 = 317.5
722 - 404.5 = 317.5
As you can see, the halfway number is 317.5 higher than 87 and 317.5 lower than 722. Therefore, our halfway between answer of 404.5 above is correct.
Halfway Between
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Halfway Between 87 and 723
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