Halfway Between 20 and 680

When you ask "What number is halfway between 20 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=20 and Y=680.

Halfway Between Line

To find the number halfway between 20 and 680, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 20 and 680 into our formula, we get:

(20 + 680)/2 = 350

Thus, the number halfway between 20 and 680 is 350.

To check that our answer is correct, we subtract 20 from 350 and subtract 350 from 680 and compare the two numbers:

350 - 20 = 330
680 - 350 = 330

As you can see, the halfway number is 330 higher than 20 and 330 lower than 680. Therefore, our halfway between answer of 350 above is correct.

Halfway Between
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