When you ask "What number is halfway between 18 and 731?" 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=731.
To find the number halfway between 18 and 731, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 731 into our formula, we get:
(18 + 731)/2 = 374.5
Thus, the number halfway between 18 and 731 is 374.5.
To check that our answer is correct, we subtract 18 from 374.5 and subtract 374.5 from 731 and compare the two numbers:
374.5 - 18 = 356.5
731 - 374.5 = 356.5
As you can see, the halfway number is 356.5 higher than 18 and 356.5 lower than 731. Therefore, our halfway between answer of 374.5 above is correct.
Halfway Between
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Halfway Between 18 and 732
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