When you ask "What number is halfway between 84 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=84 and Y=143.
To find the number halfway between 84 and 143, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 143 into our formula, we get:
(84 + 143)/2 = 113.5
Thus, the number halfway between 84 and 143 is 113.5.
To check that our answer is correct, we subtract 84 from 113.5 and subtract 113.5 from 143 and compare the two numbers:
113.5 - 84 = 29.5
143 - 113.5 = 29.5
As you can see, the halfway number is 29.5 higher than 84 and 29.5 lower than 143. Therefore, our halfway between answer of 113.5 above is correct.
Halfway Between
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Halfway Between 84 and 144
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