When you ask "What number is halfway between 42 and 715?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=715.
To find the number halfway between 42 and 715, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 715 into our formula, we get:
(42 + 715)/2 = 378.5
Thus, the number halfway between 42 and 715 is 378.5.
To check that our answer is correct, we subtract 42 from 378.5 and subtract 378.5 from 715 and compare the two numbers:
378.5 - 42 = 336.5
715 - 378.5 = 336.5
As you can see, the halfway number is 336.5 higher than 42 and 336.5 lower than 715. Therefore, our halfway between answer of 378.5 above is correct.
Halfway Between
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Halfway Between 42 and 716
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