When you ask "What number is halfway between 22 and 143?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=22 and Y=143.
To find the number halfway between 22 and 143, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 22 and 143 into our formula, we get:
(22 + 143)/2 = 82.5
Thus, the number halfway between 22 and 143 is 82.5.
To check that our answer is correct, we subtract 22 from 82.5 and subtract 82.5 from 143 and compare the two numbers:
82.5 - 22 = 60.5
143 - 82.5 = 60.5
As you can see, the halfway number is 60.5 higher than 22 and 60.5 lower than 143. Therefore, our halfway between answer of 82.5 above is correct.
Halfway Between
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Halfway Between 22 and 144
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