When you ask "What number is halfway between 20 and 597?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=597.
To find the number halfway between 20 and 597, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 597 into our formula, we get:
(20 + 597)/2 = 308.5
Thus, the number halfway between 20 and 597 is 308.5.
To check that our answer is correct, we subtract 20 from 308.5 and subtract 308.5 from 597 and compare the two numbers:
308.5 - 20 = 288.5
597 - 308.5 = 288.5
As you can see, the halfway number is 288.5 higher than 20 and 288.5 lower than 597. Therefore, our halfway between answer of 308.5 above is correct.
Halfway Between
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Halfway Between 20 and 598
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