Halfway Between 88 and 685

When you ask "What number is halfway between 88 and 685?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=685.

Halfway Between Line

To find the number halfway between 88 and 685, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 88 and 685 into our formula, we get:

(88 + 685)/2 = 386.5

Thus, the number halfway between 88 and 685 is 386.5.

To check that our answer is correct, we subtract 88 from 386.5 and subtract 386.5 from 685 and compare the two numbers:

386.5 - 88 = 298.5
685 - 386.5 = 298.5

As you can see, the halfway number is 298.5 higher than 88 and 298.5 lower than 685. Therefore, our halfway between answer of 386.5 above is correct.

Halfway Between
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Halfway Between 88 and 686
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