When you ask "What number is halfway between 100 and 495?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=495.
To find the number halfway between 100 and 495, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 100 and 495 into our formula, we get:
(100 + 495)/2 = 297.5
Thus, the number halfway between 100 and 495 is 297.5.
To check that our answer is correct, we subtract 100 from 297.5 and subtract 297.5 from 495 and compare the two numbers:
297.5 - 100 = 197.5
495 - 297.5 = 197.5
As you can see, the halfway number is 197.5 higher than 100 and 197.5 lower than 495. Therefore, our halfway between answer of 297.5 above is correct.
Halfway Between
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Halfway Between 100 and 496
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