When you ask "What number is halfway between 12 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=12 and Y=631.
To find the number halfway between 12 and 631, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 631 into our formula, we get:
(12 + 631)/2 = 321.5
Thus, the number halfway between 12 and 631 is 321.5.
To check that our answer is correct, we subtract 12 from 321.5 and subtract 321.5 from 631 and compare the two numbers:
321.5 - 12 = 309.5
631 - 321.5 = 309.5
As you can see, the halfway number is 309.5 higher than 12 and 309.5 lower than 631. Therefore, our halfway between answer of 321.5 above is correct.
Halfway Between
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Halfway Between 12 and 632
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