When you ask "What number is halfway between 20 and 525?" 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=525.
To find the number halfway between 20 and 525, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 525 into our formula, we get:
(20 + 525)/2 = 272.5
Thus, the number halfway between 20 and 525 is 272.5.
To check that our answer is correct, we subtract 20 from 272.5 and subtract 272.5 from 525 and compare the two numbers:
272.5 - 20 = 252.5
525 - 272.5 = 252.5
As you can see, the halfway number is 252.5 higher than 20 and 252.5 lower than 525. Therefore, our halfway between answer of 272.5 above is correct.
Halfway Between
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Halfway Between 20 and 526
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