When you ask "What number is halfway between 99 and 270?" 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=270.
To find the number halfway between 99 and 270, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 270 into our formula, we get:
(99 + 270)/2 = 184.5
Thus, the number halfway between 99 and 270 is 184.5.
To check that our answer is correct, we subtract 99 from 184.5 and subtract 184.5 from 270 and compare the two numbers:
184.5 - 99 = 85.5
270 - 184.5 = 85.5
As you can see, the halfway number is 85.5 higher than 99 and 85.5 lower than 270. Therefore, our halfway between answer of 184.5 above is correct.
Halfway Between
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Halfway Between 99 and 271
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