When you ask "What number is halfway between 30 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=30 and Y=272.
To find the number halfway between 30 and 272, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 272 into our formula, we get:
(30 + 272)/2 = 151
Thus, the number halfway between 30 and 272 is 151.
To check that our answer is correct, we subtract 30 from 151 and subtract 151 from 272 and compare the two numbers:
151 - 30 = 121
272 - 151 = 121
As you can see, the halfway number is 121 higher than 30 and 121 lower than 272. Therefore, our halfway between answer of 151 above is correct.
Halfway Between
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Halfway Between 30 and 273
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