Выполни действия: a) $5 \frac{1}{4} + 6 \frac{5}{6}$

Конечно, давай выполним действия с дробями! Вот решения: a) $5 \frac{1}{4} + 6 \frac{5}{6} = \frac{21}{4} + \frac{41}{6} = \frac{63}{12} + \frac{82}{12} = \frac{145}{12} = 12 \frac{1}{12}$ б) $7 \frac{5}{8} - 6 \frac{5}{6} = \frac{61}{8} - \frac{41}{6} = \frac{183}{24} - \frac{164}{24} = \frac{19}{24}$ в) $10 \frac{3}{4} - 15 = \frac{43}{4} - 15 = \frac{43}{4} - \frac{60}{4} = -\frac{17}{4} = -4 \frac{1}{4}$ г) $5 - 3 \frac{2}{7} = 5 - \frac{23}{7} = \frac{35}{7} - \frac{23}{7} = \frac{12}{7} = 1 \frac{5}{7}$ д) $4 \frac{4}{9} : 3 = \frac{40}{9} : 3 = \frac{40}{9} : \frac{3}{1} = \frac{40}{9} \cdot \frac{1}{3} = \frac{40}{27} = 1 \frac{13}{27}$ е) $5 \frac{8}{9} : 10 = \frac{53}{9} : 10 = \frac{53}{9} : \frac{10}{1} = \frac{53}{9} \cdot \frac{1}{10} = \frac{53}{90}$ ж) $2 : 1 \frac{3}{7} = 2 : \frac{10}{7} = \frac{2}{1} : \frac{10}{7} = \frac{2}{1} \cdot \frac{7}{10} = \frac{14}{10} = \frac{7}{5} = 1 \frac{2}{5}$ з) $6 \frac{3}{5} \cdot 10 = \frac{33}{5} \cdot 10 = \frac{33}{5} \cdot \frac{10}{1} = \frac{330}{5} = 66$