Halfway Between 9 and 671

When you ask "What number is halfway between 9 and 671?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=671.

Halfway Between Line

To find the number halfway between 9 and 671, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 9 and 671 into our formula, we get:

(9 + 671)/2 = 340

Thus, the number halfway between 9 and 671 is 340.

To check that our answer is correct, we subtract 9 from 340 and subtract 340 from 671 and compare the two numbers:

340 - 9 = 331
671 - 340 = 331

As you can see, the halfway number is 331 higher than 9 and 331 lower than 671. Therefore, our halfway between answer of 340 above is correct.

Halfway Between
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Halfway Between 9 and 672
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