When you ask "What number is halfway between 15 and 50?" 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=50.
To find the number halfway between 15 and 50, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 50 into our formula, we get:
(15 + 50)/2 = 32.5
Thus, the number halfway between 15 and 50 is 32.5.
To check that our answer is correct, we subtract 15 from 32.5 and subtract 32.5 from 50 and compare the two numbers:
32.5 - 15 = 17.5
50 - 32.5 = 17.5
As you can see, the halfway number is 17.5 higher than 15 and 17.5 lower than 50. Therefore, our halfway between answer of 32.5 above is correct.
Halfway Between
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