When you ask "What number is halfway between 40 and 177?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=40 and Y=177.
To find the number halfway between 40 and 177, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 40 and 177 into our formula, we get:
(40 + 177)/2 = 108.5
Thus, the number halfway between 40 and 177 is 108.5.
To check that our answer is correct, we subtract 40 from 108.5 and subtract 108.5 from 177 and compare the two numbers:
108.5 - 40 = 68.5
177 - 108.5 = 68.5
As you can see, the halfway number is 68.5 higher than 40 and 68.5 lower than 177. Therefore, our halfway between answer of 108.5 above is correct.
Halfway Between
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Halfway Between 40 and 178
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