When you ask "What number is halfway between 100 and 453?" 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=453.
To find the number halfway between 100 and 453, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 100 and 453 into our formula, we get:
(100 + 453)/2 = 276.5
Thus, the number halfway between 100 and 453 is 276.5.
To check that our answer is correct, we subtract 100 from 276.5 and subtract 276.5 from 453 and compare the two numbers:
276.5 - 100 = 176.5
453 - 276.5 = 176.5
As you can see, the halfway number is 176.5 higher than 100 and 176.5 lower than 453. Therefore, our halfway between answer of 276.5 above is correct.
Halfway Between
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Halfway Between 100 and 454
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