a) Najmniejszą liczbą na rysunku jest 0. 

$0+\frac{3}{8}=\frac{3}{8}$  

$\frac{3}{8}+\frac{3}{8}=\frac{6}{8}$  

$\frac{6}{8}+\frac{3}{8}=\frac{9}{8}=1\frac{1}{8}$  

$1\frac{1}{8}+\frac{3}{8}=1\frac{4}{8}$  

$1\frac{4}{8}+\frac{3}{8}=1\frac{7}{8}$  

$1\frac{7}{8}+\frac{3}{8}=1\frac{10}{8}=1+1\frac{2}{8}=2\frac{2}{8}$ $1\frac{7}{8}+\frac{3}{8}=1\frac{10}{8}=1+1\frac{2}{8}=2\frac{2}{8}$  
$2\frac{2}{8}+\frac{3}{8}=2\frac{5}{8}$  

$2\frac{5}{8}+\frac{3}{8}=2\frac{8}{8}=2+1=3$  

 

 b) Największą liczbą na rysunku jest 6.

$6-\frac{3}{5}=5\frac{5}{5}-\frac{3}{5}=5\frac{2}{5}$  

$5\frac{2}{5}-\frac{3}{5}=4\frac{7}{5}-\frac{3}{5}=4\frac{4}{5}$  

$4\frac{4}{5}-\frac{3}{5}=4\frac{1}{5}$  

$4\frac{1}{5}-\frac{3}{5}=3\frac{6}{5}-\frac{3}{5}=3\frac{3}{5}$  

$3\frac{3}{5}-\frac{3}{5}=3$  

$3-\frac{3}{5}=2\frac{5}{5}-\frac{3}{5}=2\frac{2}{5}$  

$2\frac{2}{5}-\frac{3}{5}=1\frac{7}{5}-\frac{3}{5}=1\frac{4}{5}$  

$1\frac{4}{5}-\frac{3}{5}=1\frac{1}{5}$  

$1\frac{1}{5}-\frac{3}{5}=\frac{6}{5}-\frac{3}{5}=\frac{3}{5}$  

$\frac{3}{5}-\frac{3}{5}=0$