Halfway Between 100 and 1000

When you ask "What number is halfway between 100 and 1000?" 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=1000.

Halfway Between Line

To find the number halfway between 100 and 1000, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 1000 into our formula, we get:

(100 + 1000)/2 = 550

Thus, the number halfway between 100 and 1000 is 550.

To check that our answer is correct, we subtract 100 from 550 and subtract 550 from 1000 and compare the two numbers:

550 - 100 = 450
1000 - 550 = 450

As you can see, the halfway number is 450 higher than 100 and 450 lower than 1000. Therefore, our halfway between answer of 550 above is correct.

Halfway Between
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Halfway Between 0 and 0
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