Halfway Between 100 and 387

When you ask "What number is halfway between 100 and 387?" 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=387.

Halfway Between Line

To find the number halfway between 100 and 387, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 387 into our formula, we get:

(100 + 387)/2 = 243.5

Thus, the number halfway between 100 and 387 is 243.5.

To check that our answer is correct, we subtract 100 from 243.5 and subtract 243.5 from 387 and compare the two numbers:

243.5 - 100 = 143.5
387 - 243.5 = 143.5

As you can see, the halfway number is 143.5 higher than 100 and 143.5 lower than 387. Therefore, our halfway between answer of 243.5 above is correct.

Halfway Between
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Halfway Between 100 and 388
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