When you ask "What number is halfway between 7 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=7 and Y=277.
To find the number halfway between 7 and 277, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 277 into our formula, we get:
(7 + 277)/2 = 142
Thus, the number halfway between 7 and 277 is 142.
To check that our answer is correct, we subtract 7 from 142 and subtract 142 from 277 and compare the two numbers:
142 - 7 = 135
277 - 142 = 135
As you can see, the halfway number is 135 higher than 7 and 135 lower than 277. Therefore, our halfway between answer of 142 above is correct.
Halfway Between
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Halfway Between 7 and 278
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