When you ask "What number is halfway between 84 and 789?" 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=789.
To find the number halfway between 84 and 789, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 789 into our formula, we get:
(84 + 789)/2 = 436.5
Thus, the number halfway between 84 and 789 is 436.5.
To check that our answer is correct, we subtract 84 from 436.5 and subtract 436.5 from 789 and compare the two numbers:
436.5 - 84 = 352.5
789 - 436.5 = 352.5
As you can see, the halfway number is 352.5 higher than 84 and 352.5 lower than 789. Therefore, our halfway between answer of 436.5 above is correct.
Halfway Between
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Halfway Between 84 and 790
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