Halfway Between 10 and 990

When you ask "What number is halfway between 10 and 990?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=10 and Y=990.

Halfway Between Line

To find the number halfway between 10 and 990, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 10 and 990 into our formula, we get:

(10 + 990)/2 = 500

Thus, the number halfway between 10 and 990 is 500.

To check that our answer is correct, we subtract 10 from 500 and subtract 500 from 990 and compare the two numbers:

500 - 10 = 490
990 - 500 = 490

As you can see, the halfway number is 490 higher than 10 and 490 lower than 990. Therefore, our halfway between answer of 500 above is correct.

Halfway Between
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Halfway Between 10 and 991
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