When you ask "What number is halfway between 20 and 235?" 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=235.
To find the number halfway between 20 and 235, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 235 into our formula, we get:
(20 + 235)/2 = 127.5
Thus, the number halfway between 20 and 235 is 127.5.
To check that our answer is correct, we subtract 20 from 127.5 and subtract 127.5 from 235 and compare the two numbers:
127.5 - 20 = 107.5
235 - 127.5 = 107.5
As you can see, the halfway number is 107.5 higher than 20 and 107.5 lower than 235. Therefore, our halfway between answer of 127.5 above is correct.
Halfway Between
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Halfway Between 20 and 236
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