Halfway Between 100 and 398

When you ask "What number is halfway between 100 and 398?" 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=398.

Halfway Between Line

To find the number halfway between 100 and 398, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 398 into our formula, we get:

(100 + 398)/2 = 249

Thus, the number halfway between 100 and 398 is 249.

To check that our answer is correct, we subtract 100 from 249 and subtract 249 from 398 and compare the two numbers:

249 - 100 = 149
398 - 249 = 149

As you can see, the halfway number is 149 higher than 100 and 149 lower than 398. Therefore, our halfway between answer of 249 above is correct.

Halfway Between
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Halfway Between 100 and 399
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