When you ask "What number is halfway between 18 and 272?" 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=272.
To find the number halfway between 18 and 272, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 272 into our formula, we get:
(18 + 272)/2 = 145
Thus, the number halfway between 18 and 272 is 145.
To check that our answer is correct, we subtract 18 from 145 and subtract 145 from 272 and compare the two numbers:
145 - 18 = 127
272 - 145 = 127
As you can see, the halfway number is 127 higher than 18 and 127 lower than 272. Therefore, our halfway between answer of 145 above is correct.
Halfway Between
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Halfway Between 18 and 273
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