When you ask "What number is halfway between 18 and 575?" 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=575.
To find the number halfway between 18 and 575, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 575 into our formula, we get:
(18 + 575)/2 = 296.5
Thus, the number halfway between 18 and 575 is 296.5.
To check that our answer is correct, we subtract 18 from 296.5 and subtract 296.5 from 575 and compare the two numbers:
296.5 - 18 = 278.5
575 - 296.5 = 278.5
As you can see, the halfway number is 278.5 higher than 18 and 278.5 lower than 575. Therefore, our halfway between answer of 296.5 above is correct.
Halfway Between
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