When you ask "What number is halfway between 18 and 494?" 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=494.
To find the number halfway between 18 and 494, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 494 into our formula, we get:
(18 + 494)/2 = 256
Thus, the number halfway between 18 and 494 is 256.
To check that our answer is correct, we subtract 18 from 256 and subtract 256 from 494 and compare the two numbers:
256 - 18 = 238
494 - 256 = 238
As you can see, the halfway number is 238 higher than 18 and 238 lower than 494. Therefore, our halfway between answer of 256 above is correct.
Halfway Between
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Halfway Between 18 and 495
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