When you ask "What number is halfway between 51 and 494?" 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=494.
To find the number halfway between 51 and 494, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 494 into our formula, we get:
(51 + 494)/2 = 272.5
Thus, the number halfway between 51 and 494 is 272.5.
To check that our answer is correct, we subtract 51 from 272.5 and subtract 272.5 from 494 and compare the two numbers:
272.5 - 51 = 221.5
494 - 272.5 = 221.5
As you can see, the halfway number is 221.5 higher than 51 and 221.5 lower than 494. Therefore, our halfway between answer of 272.5 above is correct.
Halfway Between
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Halfway Between 51 and 495
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