When you ask "What number is halfway between 99 and 489?" 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=489.
To find the number halfway between 99 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 489 into our formula, we get:
(99 + 489)/2 = 294
Thus, the number halfway between 99 and 489 is 294.
To check that our answer is correct, we subtract 99 from 294 and subtract 294 from 489 and compare the two numbers:
294 - 99 = 195
489 - 294 = 195
As you can see, the halfway number is 195 higher than 99 and 195 lower than 489. Therefore, our halfway between answer of 294 above is correct.
Halfway Between
Find halfway between two other numbers here!
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