When you ask "What number is halfway between 69 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=69 and Y=518.
To find the number halfway between 69 and 518, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 518 into our formula, we get:
(69 + 518)/2 = 293.5
Thus, the number halfway between 69 and 518 is 293.5.
To check that our answer is correct, we subtract 69 from 293.5 and subtract 293.5 from 518 and compare the two numbers:
293.5 - 69 = 224.5
518 - 293.5 = 224.5
As you can see, the halfway number is 224.5 higher than 69 and 224.5 lower than 518. Therefore, our halfway between answer of 293.5 above is correct.
Halfway Between
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Halfway Between 69 and 519
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