When you ask "What number is halfway between 30 and 228?" 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=228.
To find the number halfway between 30 and 228, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 228 into our formula, we get:
(30 + 228)/2 = 129
Thus, the number halfway between 30 and 228 is 129.
To check that our answer is correct, we subtract 30 from 129 and subtract 129 from 228 and compare the two numbers:
129 - 30 = 99
228 - 129 = 99
As you can see, the halfway number is 99 higher than 30 and 99 lower than 228. Therefore, our halfway between answer of 129 above is correct.
Halfway Between
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Halfway Between 30 and 229
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