Halfway Between 85 and 689

When you ask "What number is halfway between 85 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=85 and Y=689.

Halfway Between Line

To find the number halfway between 85 and 689, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 85 and 689 into our formula, we get:

(85 + 689)/2 = 387

Thus, the number halfway between 85 and 689 is 387.

To check that our answer is correct, we subtract 85 from 387 and subtract 387 from 689 and compare the two numbers:

387 - 85 = 302
689 - 387 = 302

As you can see, the halfway number is 302 higher than 85 and 302 lower than 689. Therefore, our halfway between answer of 387 above is correct.

Halfway Between
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Halfway Between 85 and 690
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