When you ask "What number is halfway between 12 and 657?" 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=657.
To find the number halfway between 12 and 657, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 657 into our formula, we get:
(12 + 657)/2 = 334.5
Thus, the number halfway between 12 and 657 is 334.5.
To check that our answer is correct, we subtract 12 from 334.5 and subtract 334.5 from 657 and compare the two numbers:
334.5 - 12 = 322.5
657 - 334.5 = 322.5
As you can see, the halfway number is 322.5 higher than 12 and 322.5 lower than 657. Therefore, our halfway between answer of 334.5 above is correct.
Halfway Between
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Halfway Between 12 and 658
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