When you ask "What number is halfway between 30 and 271?" 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=271.
To find the number halfway between 30 and 271, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 271 into our formula, we get:
(30 + 271)/2 = 150.5
Thus, the number halfway between 30 and 271 is 150.5.
To check that our answer is correct, we subtract 30 from 150.5 and subtract 150.5 from 271 and compare the two numbers:
150.5 - 30 = 120.5
271 - 150.5 = 120.5
As you can see, the halfway number is 120.5 higher than 30 and 120.5 lower than 271. Therefore, our halfway between answer of 150.5 above is correct.
Halfway Between
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Halfway Between 30 and 272
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