Halfway Between 100 and 642

When you ask "What number is halfway between 100 and 642?" 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=642.

Halfway Between Line

To find the number halfway between 100 and 642, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 642 into our formula, we get:

(100 + 642)/2 = 371

Thus, the number halfway between 100 and 642 is 371.

To check that our answer is correct, we subtract 100 from 371 and subtract 371 from 642 and compare the two numbers:

371 - 100 = 271
642 - 371 = 271

As you can see, the halfway number is 271 higher than 100 and 271 lower than 642. Therefore, our halfway between answer of 371 above is correct.

Halfway Between
Find halfway between two other numbers here!

Halfway Between 100 and 643
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