When you ask "What number is halfway between 42 and 631?" 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=631.
To find the number halfway between 42 and 631, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 631 into our formula, we get:
(42 + 631)/2 = 336.5
Thus, the number halfway between 42 and 631 is 336.5.
To check that our answer is correct, we subtract 42 from 336.5 and subtract 336.5 from 631 and compare the two numbers:
336.5 - 42 = 294.5
631 - 336.5 = 294.5
As you can see, the halfway number is 294.5 higher than 42 and 294.5 lower than 631. Therefore, our halfway between answer of 336.5 above is correct.
Halfway Between
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Halfway Between 42 and 632
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