When you ask "What number is halfway between 30 and 169?" 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=169.
To find the number halfway between 30 and 169, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 169 into our formula, we get:
(30 + 169)/2 = 99.5
Thus, the number halfway between 30 and 169 is 99.5.
To check that our answer is correct, we subtract 30 from 99.5 and subtract 99.5 from 169 and compare the two numbers:
99.5 - 30 = 69.5
169 - 99.5 = 69.5
As you can see, the halfway number is 69.5 higher than 30 and 69.5 lower than 169. Therefore, our halfway between answer of 99.5 above is correct.
Halfway Between
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Halfway Between 30 and 170
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