When you ask "What number is halfway between 20 and 263?" 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=263.
To find the number halfway between 20 and 263, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 263 into our formula, we get:
(20 + 263)/2 = 141.5
Thus, the number halfway between 20 and 263 is 141.5.
To check that our answer is correct, we subtract 20 from 141.5 and subtract 141.5 from 263 and compare the two numbers:
141.5 - 20 = 121.5
263 - 141.5 = 121.5
As you can see, the halfway number is 121.5 higher than 20 and 121.5 lower than 263. Therefore, our halfway between answer of 141.5 above is correct.
Halfway Between
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Halfway Between 20 and 264
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