Halfway Between 100 and 660

When you ask "What number is halfway between 100 and 660?" 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=660.

Halfway Between Line

To find the number halfway between 100 and 660, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 660 into our formula, we get:

(100 + 660)/2 = 380

Thus, the number halfway between 100 and 660 is 380.

To check that our answer is correct, we subtract 100 from 380 and subtract 380 from 660 and compare the two numbers:

380 - 100 = 280
660 - 380 = 280

As you can see, the halfway number is 280 higher than 100 and 280 lower than 660. Therefore, our halfway between answer of 380 above is correct.

Halfway Between
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