Halfway Between 80 and 899

When you ask "What number is halfway between 80 and 899?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=80 and Y=899.

Halfway Between Line

To find the number halfway between 80 and 899, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 80 and 899 into our formula, we get:

(80 + 899)/2 = 489.5

Thus, the number halfway between 80 and 899 is 489.5.

To check that our answer is correct, we subtract 80 from 489.5 and subtract 489.5 from 899 and compare the two numbers:

489.5 - 80 = 409.5
899 - 489.5 = 409.5

As you can see, the halfway number is 409.5 higher than 80 and 409.5 lower than 899. Therefore, our halfway between answer of 489.5 above is correct.

Halfway Between
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Halfway Between 80 and 900
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