When you ask "What number is halfway between 30 and 351?" 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=351.
To find the number halfway between 30 and 351, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 351 into our formula, we get:
(30 + 351)/2 = 190.5
Thus, the number halfway between 30 and 351 is 190.5.
To check that our answer is correct, we subtract 30 from 190.5 and subtract 190.5 from 351 and compare the two numbers:
190.5 - 30 = 160.5
351 - 190.5 = 160.5
As you can see, the halfway number is 160.5 higher than 30 and 160.5 lower than 351. Therefore, our halfway between answer of 190.5 above is correct.
Halfway Between
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Halfway Between 30 and 352
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