Question

Математика!!!Срочно!!!​

Answer 1

Ответ:

$1)4 \frac{5}{9} + 7 \frac{1}{6} = (4 + 7) + ( \frac{5}{9} + \frac{1}{6} ) = 11 + \frac{13}{18} = 11 \frac{13}{18} = \frac{211}{18} \\2)4 - \frac{7}{19} = \frac{76 - 7}{19} = \frac{69}{19} \\ 3) \frac{11}{15} \times \frac{21}{22} \times \frac{9}{28} \times \frac{8}{9} = \frac{1}{5} \times \frac{7}{2} \times \frac{1}{7} \times 2 = \frac{1}{5}$