When you ask "What number is halfway between 0 and 689?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=0 and Y=689.
To find the number halfway between 0 and 689, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 689 into our formula, we get:
(0 + 689)/2 = 344.5
Thus, the number halfway between 0 and 689 is 344.5.
To check that our answer is correct, we subtract 0 from 344.5 and subtract 344.5 from 689 and compare the two numbers:
344.5 - 0 = 344.5
689 - 344.5 = 344.5
As you can see, the halfway number is 344.5 higher than 0 and 344.5 lower than 689. Therefore, our halfway between answer of 344.5 above is correct.
Halfway Between
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Halfway Between 0 and 690
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