2.
[tex]a) \ 6-\frac{5}{12} = 5\frac{12}{12}-\frac{5}{12} = 5\frac{7}{12}\\\\b) \ 5\frac{6}{7} - 3\frac{2}{7} = 2\frac{4}{7}\\\\c) \ 9\frac{1}{6}-7\frac{5}{6} = 8\frac{7}{6}-7\frac{5}{6} = 1\frac{2}{6} = 1\frac{1}{3}[/tex]
3.
[tex]\frac{9}{16} - \frac{7}{16} = \frac{2}{16} =\frac{1}{8}[/tex]
Odp. Marysi zostanie 1/8 tabliczki czekolady.
