Halfway Between 100 and 688

When you ask "What number is halfway between 100 and 688?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=688.

Halfway Between Line

To find the number halfway between 100 and 688, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 688 into our formula, we get:

(100 + 688)/2 = 394

Thus, the number halfway between 100 and 688 is 394.

To check that our answer is correct, we subtract 100 from 394 and subtract 394 from 688 and compare the two numbers:

394 - 100 = 294
688 - 394 = 294

As you can see, the halfway number is 294 higher than 100 and 294 lower than 688. Therefore, our halfway between answer of 394 above is correct.

Halfway Between
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