When you ask "What number is halfway between 25 and 648?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=648.
To find the number halfway between 25 and 648, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 648 into our formula, we get:
(25 + 648)/2 = 336.5
Thus, the number halfway between 25 and 648 is 336.5.
To check that our answer is correct, we subtract 25 from 336.5 and subtract 336.5 from 648 and compare the two numbers:
336.5 - 25 = 311.5
648 - 336.5 = 311.5
As you can see, the halfway number is 311.5 higher than 25 and 311.5 lower than 648. Therefore, our halfway between answer of 336.5 above is correct.
Halfway Between
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Halfway Between 25 and 649
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