When you ask "What number is halfway between 57 and 158?" 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=158.
To find the number halfway between 57 and 158, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 158 into our formula, we get:
(57 + 158)/2 = 107.5
Thus, the number halfway between 57 and 158 is 107.5.
To check that our answer is correct, we subtract 57 from 107.5 and subtract 107.5 from 158 and compare the two numbers:
107.5 - 57 = 50.5
158 - 107.5 = 50.5
As you can see, the halfway number is 50.5 higher than 57 and 50.5 lower than 158. Therefore, our halfway between answer of 107.5 above is correct.
Halfway Between
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Halfway Between 57 and 159
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