$\text{Wiemy, z˙e }1:9=\frac{1}{9}=0,\left(1\right)$  

 

$\text{a)}4:9=\frac{4}{9}=4\cdot \frac{1}{9}=4\cdot 0,\left(1\right)=4\cdot 0,1111\dots =0,4444\dots =0,\left(4\right)$

$\text{b)}6:9=\frac{6}{9}=6\cdot \frac{1}{9}=6\cdot 0,\left(1\right)=0,6666\dots =0,\left(6\right)$

$\text{c)}11:9=\frac{11}{9}=1\frac{2}{9}=1+\frac{2}{9}=1+2\cdot \frac{1}{9}=1+2\cdot 0,\left(1\right)=1+0,\left(2\right)=1,\left(2\right)$  

$\text{d)}89:9=\frac{89}{9}=9\frac{8}{9}=9+\frac{8}{9}=9+8\cdot \frac{1}{9}=9+8\cdot 0,\left(1\right)=8+0,\left(8\right)=9,\left(8\right)$