When you ask "What number is halfway between 99 and 342?" 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=342.
To find the number halfway between 99 and 342, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 342 into our formula, we get:
(99 + 342)/2 = 220.5
Thus, the number halfway between 99 and 342 is 220.5.
To check that our answer is correct, we subtract 99 from 220.5 and subtract 220.5 from 342 and compare the two numbers:
220.5 - 99 = 121.5
342 - 220.5 = 121.5
As you can see, the halfway number is 121.5 higher than 99 and 121.5 lower than 342. Therefore, our halfway between answer of 220.5 above is correct.
Halfway Between
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Halfway Between 99 and 343
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