Question

помогите пожалуйста кому не трудно скиньте фото​

Answer 1

Ответ:

$\frac{4}{15} + \frac{3}{5} = \frac{4 + 3 \times 3}{15} = \frac{4 + 9}{15} = \frac{13}{15} \\ \frac{19}{20} - \frac{4}{15} = \frac{3 \times 19 - 4 \times 4}{60} = \frac{57 - 16}{60} = \frac{41}{60} \\ \frac{8}{11} \times \frac{33}{40} = \frac{8 \times 3 \times 11}{11 \times 8 \times 5} = \frac{3}{5} \\ \frac{4}{35} \div \frac{16}{45} = \frac{4}{35} \times \frac{45}{16} = \frac{4 \times 5 \times 9}{5 \times 7 \times 4 \times 4} = \frac{9}{28} \\ \frac{7}{18} + 4 \frac{7}{36} = \frac{14}{36} + 4 \frac{7}{36} = 4 \frac{21}{36} = 4 \frac{7}{12} \\ 5 \frac{1}{2} + 3 \frac{5}{12} = 5 \frac{6}{12} + 3 \frac{5}{12} = 8 \frac{11}{12} \\ 3 \frac{5}{12} - \frac{7}{24} = 3 \frac{10}{24 - \frac{7}{24} } = 3 \frac{3}{24} = 3 \frac{1}{8} \\ 10 \frac{6}{7} - 1 \frac{3}{14} = 10 \frac{12}{14} - 1 \frac{3}{14} = 9 \frac{9}{14} \\ 5 \frac{1}{3} - 2 \frac{7}{9} = 5 \frac{3}{9} - 2 \frac{7}{9} = 4 \frac{12}{9} - 2 \frac{7}{9} = 2 \frac{5}{9} \\ 8 - \frac{5}{17} = 7 \frac{12}{17} \\ 5 - 1 \frac{5}{9} = 3 \frac{4}{9} \\ 3 \frac{6}{7} \times 1 \frac{8}{9} = \frac{27}{7} \times \frac{17}{9} = \frac{51}{7} \\ 3 \frac{9}{10} \div 1 \frac{13}{20} = \frac{39}{10} \times \frac{20}{33} = \frac{26}{11} = 2 \frac{4}{11} \\ 5 \times 3 \frac{4}{15} = \frac{5 \times 49}{15} = \frac{49}{3} = 16 \frac{1}{3} \\ 12 \div 1 \frac{1}{5} = \frac{12 \times 5}{6} = 10 \\ 7 \frac{4}{5} \div 39 = \frac{39}{5 \times 39} = \frac{1}{5} \\ 3 \frac{2}{5} \times \frac{25}{36} + 4 = \frac{17 \times 25}{5 \times 36} + 4 = \frac{17 \times 5}{36} + 4 = \frac{85}{36} + 4 = 2 \frac{1}{3} + 4 = 6 \frac{1}{3} \\ \frac{ \frac{1}{2} + \frac{1}{4} }{12} = \frac{ \frac{3}{4} }{12} = \frac{3 \times 12}{4} = 9 \\ \frac{9}{16} \div (1 \frac{4}{7} - \frac{1}{7} ) = \frac{9}{16} \div 1 \frac{3}{7} = \frac{9}{16} \times \frac{7}{10} = \frac{63}{160}$