Halfway Between 70 and 688

When you ask "What number is halfway between 70 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=70 and Y=688.

Halfway Between Line

To find the number halfway between 70 and 688, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 70 and 688 into our formula, we get:

(70 + 688)/2 = 379

Thus, the number halfway between 70 and 688 is 379.

To check that our answer is correct, we subtract 70 from 379 and subtract 379 from 688 and compare the two numbers:

379 - 70 = 309
688 - 379 = 309

As you can see, the halfway number is 309 higher than 70 and 309 lower than 688. Therefore, our halfway between answer of 379 above is correct.

Halfway Between
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