When you ask "What number is halfway between 18 and 274?" 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=274.
To find the number halfway between 18 and 274, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 274 into our formula, we get:
(18 + 274)/2 = 146
Thus, the number halfway between 18 and 274 is 146.
To check that our answer is correct, we subtract 18 from 146 and subtract 146 from 274 and compare the two numbers:
146 - 18 = 128
274 - 146 = 128
As you can see, the halfway number is 128 higher than 18 and 128 lower than 274. Therefore, our halfway between answer of 146 above is correct.
Halfway Between
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Halfway Between 18 and 275
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