When you ask "What number is halfway between 15 and 498?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=498.
To find the number halfway between 15 and 498, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 498 into our formula, we get:
(15 + 498)/2 = 256.5
Thus, the number halfway between 15 and 498 is 256.5.
To check that our answer is correct, we subtract 15 from 256.5 and subtract 256.5 from 498 and compare the two numbers:
256.5 - 15 = 241.5
498 - 256.5 = 241.5
As you can see, the halfway number is 241.5 higher than 15 and 241.5 lower than 498. Therefore, our halfway between answer of 256.5 above is correct.
Halfway Between
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Halfway Between 15 and 499
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