Question

помогите пожалуйста решить осталось 1 час 38 минут​

Answer 1

1.

$4 \frac{3}{8} \div 2 \frac{1}{10} + 2 \frac{5}{8} \div 3 \frac{3}{5} = \\ \frac{35}{8} \div \frac{21}{10} + \frac{21}{8} \div \frac{18}{5} = \frac{35}{8} \times \frac{10}{21} + \frac{21}{8} \times \frac{5}{18} = \frac{5}{4} \times \frac{5}{3} + \frac{7}{8} \times \frac{5}{6} = \frac{25}{12} + \frac{35}{48} = \frac{100 + 35}{48} = \frac{135}{48} = \frac{45}{16}$

2.

$3 \frac{3}{4} \div 1 \frac{1}{12} - 2 \frac{2}{13} \div 4 \frac{2}{3} = \frac{15}{4} \div \frac{13}{12} - \frac{28}{13} \div \frac{14}{3} = \\ \frac{15}{4} \times \frac{12}{13} - \frac{28}{13} \times \frac{3}{14} = 15 \times \frac{3}{13} - \frac{2}{13} \times 3 = \frac{45}{13} - \frac{6}{13} = \frac{45 - 6}{13} = \frac{39}{13} = 3$