When you ask "What number is halfway between 57 and 212?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=57 and Y=212.
To find the number halfway between 57 and 212, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 212 into our formula, we get:
(57 + 212)/2 = 134.5
Thus, the number halfway between 57 and 212 is 134.5.
To check that our answer is correct, we subtract 57 from 134.5 and subtract 134.5 from 212 and compare the two numbers:
134.5 - 57 = 77.5
212 - 134.5 = 77.5
As you can see, the halfway number is 77.5 higher than 57 and 77.5 lower than 212. Therefore, our halfway between answer of 134.5 above is correct.
Halfway Between
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Halfway Between 57 and 213
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