When you ask "What number is halfway between 20 and 237?" 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=237.
To find the number halfway between 20 and 237, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 237 into our formula, we get:
(20 + 237)/2 = 128.5
Thus, the number halfway between 20 and 237 is 128.5.
To check that our answer is correct, we subtract 20 from 128.5 and subtract 128.5 from 237 and compare the two numbers:
128.5 - 20 = 108.5
237 - 128.5 = 108.5
As you can see, the halfway number is 108.5 higher than 20 and 108.5 lower than 237. Therefore, our halfway between answer of 128.5 above is correct.
Halfway Between
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