When you ask "What number is halfway between 30 and 253?" 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=253.
To find the number halfway between 30 and 253, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 253 into our formula, we get:
(30 + 253)/2 = 141.5
Thus, the number halfway between 30 and 253 is 141.5.
To check that our answer is correct, we subtract 30 from 141.5 and subtract 141.5 from 253 and compare the two numbers:
141.5 - 30 = 111.5
253 - 141.5 = 111.5
As you can see, the halfway number is 111.5 higher than 30 and 111.5 lower than 253. Therefore, our halfway between answer of 141.5 above is correct.
Halfway Between
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Halfway Between 30 and 254
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