Odpowiedź:
Tabela 1):
[tex]1-\cfrac{1}{5}=\cfrac{5}{5}-\cfrac{1}{5}=\cfrac{4}{5}\\
\\
2-\cfrac{1}{5}=1\cfrac{5}{5}-\cfrac{1}{5}=1\cfrac{4}{5}\\
\\
6-\cfrac{1}{5}=5\cfrac{5}{5}-\cfrac{1}{5}=5\cfrac{4}{5}
[/tex]
Tabela 2):
[tex]1-\cfrac{4}{7}=\cfrac{7}{7}-\cfrac{4}{7}=\cfrac{3}{7}\\
\\
2-\cfrac{4}{7}=1\cfrac{7}{7}-\cfrac{4}{7}=1\cfrac{3}{7}\\
\\
7-\cfrac{4}{7}=6\cfrac{7}{7}-\cfrac{4}{7}=6\cfrac{3}{7}[/tex]
Tabela 3):
[tex]3-\cfrac{5}{11}=2\cfrac{11}{11}-\cfrac{5}{11}=2\cfrac{6}{11}\\
\\
5-\cfrac{5}{11}=4\cfrac{11}{11}-\cfrac{5}{11}=4\cfrac{6}{11}\\
\\
8-\cfrac{5}{11}=7\cfrac{11}{11}-\cfrac{5}{11}=7\cfrac{6}{11}
[/tex]
Tabela 4):
[tex]5-2\cfrac{4}{9}=4\cfrac{9}{9}-2\cfrac{4}{9}=2\cfrac{5}{9}\\
\\
12-2\cfrac{4}{9}=11\cfrac{9}{9}-2\cfrac{4}{9}=9\cfrac{5}{9}\\
\\
20-2\cfrac{4}{9}=19\cfrac{9}{9}-2\cfrac{4}{9}=17\cfrac{5}{9}
[/tex]
Szczegółowe wyjaśnienie:
