Halfway Between 100 and 878

When you ask "What number is halfway between 100 and 878?" 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=878.

Halfway Between Line

To find the number halfway between 100 and 878, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 878 into our formula, we get:

(100 + 878)/2 = 489

Thus, the number halfway between 100 and 878 is 489.

To check that our answer is correct, we subtract 100 from 489 and subtract 489 from 878 and compare the two numbers:

489 - 100 = 389
878 - 489 = 389

As you can see, the halfway number is 389 higher than 100 and 389 lower than 878. Therefore, our halfway between answer of 489 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 100 and 879
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