3)4-2-1=

3) $$\begin{array}{rcl}4\frac{8}{11}-2\frac{5}{11}-1\frac{1}{11}&=&2\frac{3}{11}-1\frac{1}{11}=1\frac{2}{11}\end{array}$$

Ответ: $$1\frac{2}{11}$$