Question

Help If $a$, $b$, $c$, and $d$ are replaced by four distinct digits from $1$ to $9$, inclusive, then what's the largest possible value of the difference $a.b - c.d$ ?

Answer 1

:Correct answer is 18.3

:Dollar replacement 70

Answer 2

Answer: 10 I think

Explanation:

9+1 I guess