Halfway Between 45 and 645

When you ask "What number is halfway between 45 and 645?" 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=645.

Halfway Between Line

To find the number halfway between 45 and 645, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 45 and 645 into our formula, we get:

(45 + 645)/2 = 345

Thus, the number halfway between 45 and 645 is 345.

To check that our answer is correct, we subtract 45 from 345 and subtract 345 from 645 and compare the two numbers:

345 - 45 = 300
645 - 345 = 300

As you can see, the halfway number is 300 higher than 45 and 300 lower than 645. Therefore, our halfway between answer of 345 above is correct.

Halfway Between
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Halfway Between 45 and 646
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