When you ask "What number is halfway between 99 and 179?" 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=179.
To find the number halfway between 99 and 179, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 179 into our formula, we get:
(99 + 179)/2 = 139
Thus, the number halfway between 99 and 179 is 139.
To check that our answer is correct, we subtract 99 from 139 and subtract 139 from 179 and compare the two numbers:
139 - 99 = 40
179 - 139 = 40
As you can see, the halfway number is 40 higher than 99 and 40 lower than 179. Therefore, our halfway between answer of 139 above is correct.
Halfway Between
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Halfway Between 99 and 180
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