6) 10 - 1

1. Convert mixed numbers to improper fractions: $$10 = \frac{110}{11}$$, $$1\frac{10}{11} = \frac{21}{11}$$.
2. Subtract the fractions: $$\frac{110}{11} - \frac{21}{11} = \frac{89}{11} = 8\frac{1}{11}$$.