When you ask "What number is halfway between 57 and 188?" 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=188.
To find the number halfway between 57 and 188, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 188 into our formula, we get:
(57 + 188)/2 = 122.5
Thus, the number halfway between 57 and 188 is 122.5.
To check that our answer is correct, we subtract 57 from 122.5 and subtract 122.5 from 188 and compare the two numbers:
122.5 - 57 = 65.5
188 - 122.5 = 65.5
As you can see, the halfway number is 65.5 higher than 57 and 65.5 lower than 188. Therefore, our halfway between answer of 122.5 above is correct.
Halfway Between
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Halfway Between 57 and 189
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