When you ask "What number is halfway between 69 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=69 and Y=680.
To find the number halfway between 69 and 680, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 680 into our formula, we get:
(69 + 680)/2 = 374.5
Thus, the number halfway between 69 and 680 is 374.5.
To check that our answer is correct, we subtract 69 from 374.5 and subtract 374.5 from 680 and compare the two numbers:
374.5 - 69 = 305.5
680 - 374.5 = 305.5
As you can see, the halfway number is 305.5 higher than 69 and 305.5 lower than 680. Therefore, our halfway between answer of 374.5 above is correct.
Halfway Between
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