When you ask "What number is halfway between 8 and 278?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=278.
To find the number halfway between 8 and 278, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 278 into our formula, we get:
(8 + 278)/2 = 143
Thus, the number halfway between 8 and 278 is 143.
To check that our answer is correct, we subtract 8 from 143 and subtract 143 from 278 and compare the two numbers:
143 - 8 = 135
278 - 143 = 135
As you can see, the halfway number is 135 higher than 8 and 135 lower than 278. Therefore, our halfway between answer of 143 above is correct.
Halfway Between
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Halfway Between 8 and 279
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