When you ask "What number is halfway between 68 and 680?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=68 and Y=680.
To find the number halfway between 68 and 680, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 680 into our formula, we get:
(68 + 680)/2 = 374
Thus, the number halfway between 68 and 680 is 374.
To check that our answer is correct, we subtract 68 from 374 and subtract 374 from 680 and compare the two numbers:
374 - 68 = 306
680 - 374 = 306
As you can see, the halfway number is 306 higher than 68 and 306 lower than 680. Therefore, our halfway between answer of 374 above is correct.
Halfway Between
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