When you ask "What number is halfway between 99 and 570?" 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=570.
To find the number halfway between 99 and 570, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 570 into our formula, we get:
(99 + 570)/2 = 334.5
Thus, the number halfway between 99 and 570 is 334.5.
To check that our answer is correct, we subtract 99 from 334.5 and subtract 334.5 from 570 and compare the two numbers:
334.5 - 99 = 235.5
570 - 334.5 = 235.5
As you can see, the halfway number is 235.5 higher than 99 and 235.5 lower than 570. Therefore, our halfway between answer of 334.5 above is correct.
Halfway Between
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