When you ask "What number is halfway between 56 and 309?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=56 and Y=309.
To find the number halfway between 56 and 309, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 56 and 309 into our formula, we get:
(56 + 309)/2 = 182.5
Thus, the number halfway between 56 and 309 is 182.5.
To check that our answer is correct, we subtract 56 from 182.5 and subtract 182.5 from 309 and compare the two numbers:
182.5 - 56 = 126.5
309 - 182.5 = 126.5
As you can see, the halfway number is 126.5 higher than 56 and 126.5 lower than 309. Therefore, our halfway between answer of 182.5 above is correct.
Halfway Between
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Halfway Between 56 and 310
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