When you ask "What number is halfway between 84 and 578?" 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=578.
To find the number halfway between 84 and 578, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 578 into our formula, we get:
(84 + 578)/2 = 331
Thus, the number halfway between 84 and 578 is 331.
To check that our answer is correct, we subtract 84 from 331 and subtract 331 from 578 and compare the two numbers:
331 - 84 = 247
578 - 331 = 247
As you can see, the halfway number is 247 higher than 84 and 247 lower than 578. Therefore, our halfway between answer of 331 above is correct.
Halfway Between
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Halfway Between 84 and 579
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