When you ask "What number is halfway between 18 and 901?" 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=901.
To find the number halfway between 18 and 901, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 901 into our formula, we get:
(18 + 901)/2 = 459.5
Thus, the number halfway between 18 and 901 is 459.5.
To check that our answer is correct, we subtract 18 from 459.5 and subtract 459.5 from 901 and compare the two numbers:
459.5 - 18 = 441.5
901 - 459.5 = 441.5
As you can see, the halfway number is 441.5 higher than 18 and 441.5 lower than 901. Therefore, our halfway between answer of 459.5 above is correct.
Halfway Between
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