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Пример 1.

1) [tex]\displaystyle 3\frac{1}{9} +5\frac{6}{9} =8\frac{7}{9}[/tex]

2)[tex]\displaystyle 12\frac{4}{9} -8\frac{7}{9} = \frac{112}{9}-\frac{79}{9} = \frac{33}{9} =\frac{11}{3} =3\frac{2}{3}[/tex]

Пример 2.

1)[tex]\displaystyle 6-3\frac{5}{6} =5\frac{6}{6} -3\frac{5}{6} =2\frac{1}{6}[/tex]

2)[tex]\displaystyle 3\frac{4}{6}+2\frac{1}{6}=5\frac{5}{6}[/tex]

Ответ: 1) [tex]\displaystyle 3\frac{2}{3}[/tex], 2)[tex]\displaystyle 5\frac{5}{6}[/tex].

Пошаговое объяснение:

№1

1) 3 1/9 + 5 6/9 = 8 7/9

2) 12 4/9 - 8 7/9 = 11 13/9 - 8 7/9 = 3 6/9 = 3 2/3

№2

1) 6 - 3 5/6 = 5 6/6 - 3 5/6 = 2 1/6

2) 3 4/6 + 2 1/6 = 5 5/6