When you ask "What number is halfway between 84 and 859?" 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=859.
To find the number halfway between 84 and 859, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 859 into our formula, we get:
(84 + 859)/2 = 471.5
Thus, the number halfway between 84 and 859 is 471.5.
To check that our answer is correct, we subtract 84 from 471.5 and subtract 471.5 from 859 and compare the two numbers:
471.5 - 84 = 387.5
859 - 471.5 = 387.5
As you can see, the halfway number is 387.5 higher than 84 and 387.5 lower than 859. Therefore, our halfway between answer of 471.5 above is correct.
Halfway Between
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Halfway Between 84 and 860
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