When you ask "What number is halfway between 21 and 614?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=614.
To find the number halfway between 21 and 614, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 614 into our formula, we get:
(21 + 614)/2 = 317.5
Thus, the number halfway between 21 and 614 is 317.5.
To check that our answer is correct, we subtract 21 from 317.5 and subtract 317.5 from 614 and compare the two numbers:
317.5 - 21 = 296.5
614 - 317.5 = 296.5
As you can see, the halfway number is 296.5 higher than 21 and 296.5 lower than 614. Therefore, our halfway between answer of 317.5 above is correct.
Halfway Between
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Halfway Between 21 and 615
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