When you ask "What number is halfway between 30 and 514?" 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=514.
To find the number halfway between 30 and 514, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 514 into our formula, we get:
(30 + 514)/2 = 272
Thus, the number halfway between 30 and 514 is 272.
To check that our answer is correct, we subtract 30 from 272 and subtract 272 from 514 and compare the two numbers:
272 - 30 = 242
514 - 272 = 242
As you can see, the halfway number is 242 higher than 30 and 242 lower than 514. Therefore, our halfway between answer of 272 above is correct.
Halfway Between
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Halfway Between 30 and 515
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