When you ask "What number is halfway between 15 and 305?" 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=305.
To find the number halfway between 15 and 305, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 305 into our formula, we get:
(15 + 305)/2 = 160
Thus, the number halfway between 15 and 305 is 160.
To check that our answer is correct, we subtract 15 from 160 and subtract 160 from 305 and compare the two numbers:
160 - 15 = 145
305 - 160 = 145
As you can see, the halfway number is 145 higher than 15 and 145 lower than 305. Therefore, our halfway between answer of 160 above is correct.
Halfway Between
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Halfway Between 15 and 306
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