When you ask "What number is halfway between 56 and 217?" 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=217.
To find the number halfway between 56 and 217, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 56 and 217 into our formula, we get:
(56 + 217)/2 = 136.5
Thus, the number halfway between 56 and 217 is 136.5.
To check that our answer is correct, we subtract 56 from 136.5 and subtract 136.5 from 217 and compare the two numbers:
136.5 - 56 = 80.5
217 - 136.5 = 80.5
As you can see, the halfway number is 80.5 higher than 56 and 80.5 lower than 217. Therefore, our halfway between answer of 136.5 above is correct.
Halfway Between
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Halfway Between 56 and 218
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