When you ask "What number is halfway between 34 and 645?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=34 and Y=645.
To find the number halfway between 34 and 645, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 34 and 645 into our formula, we get:
(34 + 645)/2 = 339.5
Thus, the number halfway between 34 and 645 is 339.5.
To check that our answer is correct, we subtract 34 from 339.5 and subtract 339.5 from 645 and compare the two numbers:
339.5 - 34 = 305.5
645 - 339.5 = 305.5
As you can see, the halfway number is 305.5 higher than 34 and 305.5 lower than 645. Therefore, our halfway between answer of 339.5 above is correct.
Halfway Between
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Halfway Between 34 and 646
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