Odpowiedź :
Obliczenia
[tex]9 \frac{1}{6} - 6 \frac{7}{21} = 9 \frac{1}{6} - 6 \frac{1}{3} = 9 \frac{1}{6} - 6 \frac{2}{6} = 8 \frac{7}{6} - 6 \frac{2}{6} = 2 \frac{5}{6 } \\ [/tex]
Obliczenia
[tex]9 \frac{1}{6} - 6 \frac{7}{21} = 9 \frac{1}{6} - 6 \frac{1}{3} = 9 \frac{1}{6} - 6 \frac{2}{6} = 8 \frac{7}{6} - 6 \frac{2}{6} = 2 \frac{5}{6 } \\ [/tex]