Halfway Between 45 and 640

When you ask "What number is halfway between 45 and 640?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=45 and Y=640.

Halfway Between Line

To find the number halfway between 45 and 640, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 45 and 640 into our formula, we get:

(45 + 640)/2 = 342.5

Thus, the number halfway between 45 and 640 is 342.5.

To check that our answer is correct, we subtract 45 from 342.5 and subtract 342.5 from 640 and compare the two numbers:

342.5 - 45 = 297.5
640 - 342.5 = 297.5

As you can see, the halfway number is 297.5 higher than 45 and 297.5 lower than 640. Therefore, our halfway between answer of 342.5 above is correct.

Halfway Between
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