When you ask "What number is halfway between 56 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=56 and Y=645.
To find the number halfway between 56 and 645, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 56 and 645 into our formula, we get:
(56 + 645)/2 = 350.5
Thus, the number halfway between 56 and 645 is 350.5.
To check that our answer is correct, we subtract 56 from 350.5 and subtract 350.5 from 645 and compare the two numbers:
350.5 - 56 = 294.5
645 - 350.5 = 294.5
As you can see, the halfway number is 294.5 higher than 56 and 294.5 lower than 645. Therefore, our halfway between answer of 350.5 above is correct.
Halfway Between
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Halfway Between 56 and 646
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