When you ask "What number is halfway between 51 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=51 and Y=498.
To find the number halfway between 51 and 498, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 498 into our formula, we get:
(51 + 498)/2 = 274.5
Thus, the number halfway between 51 and 498 is 274.5.
To check that our answer is correct, we subtract 51 from 274.5 and subtract 274.5 from 498 and compare the two numbers:
274.5 - 51 = 223.5
498 - 274.5 = 223.5
As you can see, the halfway number is 223.5 higher than 51 and 223.5 lower than 498. Therefore, our halfway between answer of 274.5 above is correct.
Halfway Between
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Halfway Between 51 and 499
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