When you ask "What number is halfway between 99 and 275?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=99 and Y=275.
To find the number halfway between 99 and 275, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 275 into our formula, we get:
(99 + 275)/2 = 187
Thus, the number halfway between 99 and 275 is 187.
To check that our answer is correct, we subtract 99 from 187 and subtract 187 from 275 and compare the two numbers:
187 - 99 = 88
275 - 187 = 88
As you can see, the halfway number is 88 higher than 99 and 88 lower than 275. Therefore, our halfway between answer of 187 above is correct.
Halfway Between
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Halfway Between 99 and 276
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