When you ask "What number is halfway between 18 and 725?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=725.
To find the number halfway between 18 and 725, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 725 into our formula, we get:
(18 + 725)/2 = 371.5
Thus, the number halfway between 18 and 725 is 371.5.
To check that our answer is correct, we subtract 18 from 371.5 and subtract 371.5 from 725 and compare the two numbers:
371.5 - 18 = 353.5
725 - 371.5 = 353.5
As you can see, the halfway number is 353.5 higher than 18 and 353.5 lower than 725. Therefore, our halfway between answer of 371.5 above is correct.
Halfway Between
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Halfway Between 18 and 726
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