When you ask "What number is halfway between 40 and 717?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=40 and Y=717.
To find the number halfway between 40 and 717, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 40 and 717 into our formula, we get:
(40 + 717)/2 = 378.5
Thus, the number halfway between 40 and 717 is 378.5.
To check that our answer is correct, we subtract 40 from 378.5 and subtract 378.5 from 717 and compare the two numbers:
378.5 - 40 = 338.5
717 - 378.5 = 338.5
As you can see, the halfway number is 338.5 higher than 40 and 338.5 lower than 717. Therefore, our halfway between answer of 378.5 above is correct.
Halfway Between
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Halfway Between 40 and 718
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