When you ask "What number is halfway between 40 and 277?" 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=277.
To find the number halfway between 40 and 277, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 40 and 277 into our formula, we get:
(40 + 277)/2 = 158.5
Thus, the number halfway between 40 and 277 is 158.5.
To check that our answer is correct, we subtract 40 from 158.5 and subtract 158.5 from 277 and compare the two numbers:
158.5 - 40 = 118.5
277 - 158.5 = 118.5
As you can see, the halfway number is 118.5 higher than 40 and 118.5 lower than 277. Therefore, our halfway between answer of 158.5 above is correct.
Halfway Between
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Halfway Between 40 and 278
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