2. Выполнить действия: A) \(\frac{4}{8} + \frac{5}{9} =\) Б) \(\frac{4}{7} - \frac{5}{9} =\) B) \(\frac{19}{20} - \frac{3}{4} =\) Г) \(4 \frac{1}{6} + 1 \frac{5}{12} =\)

2. Выполним действия:

А) \(\frac{4}{8} + \frac{5}{9} =\)

• \(\frac{4}{8} + \frac{5}{9} = \frac{1}{2} + \frac{5}{9} = \frac{9}{18} + \frac{10}{18} = \frac{19}{18} = 1 \frac{1}{18}\)

Б) \(\frac{4}{7} - \frac{5}{9} =\)

• \(\frac{4}{7} - \frac{5}{9} = \frac{4 \cdot 9}{7 \cdot 9} - \frac{5 \cdot 7}{9 \cdot 7} = \frac{36}{63} - \frac{35}{63} = \frac{1}{63}\)

В) \(\frac{19}{20} - \frac{3}{4} =\)

• \(\frac{19}{20} - \frac{3}{4} = \frac{19}{20} - \frac{3 \cdot 5}{4 \cdot 5} = \frac{19}{20} - \frac{15}{20} = \frac{4}{20} = \frac{1}{5}\)

Г) \(4 \frac{1}{6} + 1 \frac{5}{12} =\)

• \(4 \frac{1}{6} + 1 \frac{5}{12} = 4 \frac{2}{12} + 1 \frac{5}{12} = 5 \frac{7}{12}\)

Ответ: А) \(1 \frac{1}{18}\); Б) \(\frac{1}{63}\); В) \(\frac{1}{5}\); Г) \(5 \frac{7}{12}\)