Halfway Between 100 and 318

When you ask "What number is halfway between 100 and 318?" 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=318.

Halfway Between Line

To find the number halfway between 100 and 318, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 318 into our formula, we get:

(100 + 318)/2 = 209

Thus, the number halfway between 100 and 318 is 209.

To check that our answer is correct, we subtract 100 from 209 and subtract 209 from 318 and compare the two numbers:

209 - 100 = 109
318 - 209 = 109

As you can see, the halfway number is 109 higher than 100 and 109 lower than 318. Therefore, our halfway between answer of 209 above is correct.

Halfway Between
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Halfway Between 100 and 319
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