Halfway Between 20 and 518

When you ask "What number is halfway between 20 and 518?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=518.

Halfway Between Line

To find the number halfway between 20 and 518, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 20 and 518 into our formula, we get:

(20 + 518)/2 = 269

Thus, the number halfway between 20 and 518 is 269.

To check that our answer is correct, we subtract 20 from 269 and subtract 269 from 518 and compare the two numbers:

269 - 20 = 249
518 - 269 = 249

As you can see, the halfway number is 249 higher than 20 and 249 lower than 518. Therefore, our halfway between answer of 269 above is correct.

Halfway Between
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Halfway Between 20 and 519
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