When you ask "What number is halfway between 4 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=4 and Y=277.
To find the number halfway between 4 and 277, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 277 into our formula, we get:
(4 + 277)/2 = 140.5
Thus, the number halfway between 4 and 277 is 140.5.
To check that our answer is correct, we subtract 4 from 140.5 and subtract 140.5 from 277 and compare the two numbers:
140.5 - 4 = 136.5
277 - 140.5 = 136.5
As you can see, the halfway number is 136.5 higher than 4 and 136.5 lower than 277. Therefore, our halfway between answer of 140.5 above is correct.
Halfway Between
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Halfway Between 4 and 278
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