When you ask "What number is halfway between 88 and 647?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=647.
To find the number halfway between 88 and 647, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 647 into our formula, we get:
(88 + 647)/2 = 367.5
Thus, the number halfway between 88 and 647 is 367.5.
To check that our answer is correct, we subtract 88 from 367.5 and subtract 367.5 from 647 and compare the two numbers:
367.5 - 88 = 279.5
647 - 367.5 = 279.5
As you can see, the halfway number is 279.5 higher than 88 and 279.5 lower than 647. Therefore, our halfway between answer of 367.5 above is correct.
Halfway Between
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Halfway Between 88 and 648
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