When you ask "What number is halfway between 49 and 518?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=49 and Y=518.
To find the number halfway between 49 and 518, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 49 and 518 into our formula, we get:
(49 + 518)/2 = 283.5
Thus, the number halfway between 49 and 518 is 283.5.
To check that our answer is correct, we subtract 49 from 283.5 and subtract 283.5 from 518 and compare the two numbers:
283.5 - 49 = 234.5
518 - 283.5 = 234.5
As you can see, the halfway number is 234.5 higher than 49 and 234.5 lower than 518. Therefore, our halfway between answer of 283.5 above is correct.
Halfway Between
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Halfway Between 49 and 519
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