When you ask "What number is halfway between 15 and 322?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=322.
To find the number halfway between 15 and 322, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 322 into our formula, we get:
(15 + 322)/2 = 168.5
Thus, the number halfway between 15 and 322 is 168.5.
To check that our answer is correct, we subtract 15 from 168.5 and subtract 168.5 from 322 and compare the two numbers:
168.5 - 15 = 153.5
322 - 168.5 = 153.5
As you can see, the halfway number is 153.5 higher than 15 and 153.5 lower than 322. Therefore, our halfway between answer of 168.5 above is correct.
Halfway Between
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Halfway Between 15 and 323
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