When you ask "What number is halfway between 20 and 286?" 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=286.
To find the number halfway between 20 and 286, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 286 into our formula, we get:
(20 + 286)/2 = 153
Thus, the number halfway between 20 and 286 is 153.
To check that our answer is correct, we subtract 20 from 153 and subtract 153 from 286 and compare the two numbers:
153 - 20 = 133
286 - 153 = 133
As you can see, the halfway number is 133 higher than 20 and 133 lower than 286. Therefore, our halfway between answer of 153 above is correct.
Halfway Between
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Halfway Between 20 and 287
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