When you ask "What number is halfway between 18 and 601?" 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=601.
To find the number halfway between 18 and 601, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 601 into our formula, we get:
(18 + 601)/2 = 309.5
Thus, the number halfway between 18 and 601 is 309.5.
To check that our answer is correct, we subtract 18 from 309.5 and subtract 309.5 from 601 and compare the two numbers:
309.5 - 18 = 291.5
601 - 309.5 = 291.5
As you can see, the halfway number is 291.5 higher than 18 and 291.5 lower than 601. Therefore, our halfway between answer of 309.5 above is correct.
Halfway Between
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Halfway Between 18 and 602
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