Question

решить нужно
https://yapx.ru/v/OBL8K - скриншот задания

Answer 1

▪︎а)

$\\ \frac{3 \frac{1}{8} + 2 \frac{1}{12} - \frac{1}{3} }{7.3 - 0.4 \times 8.5} = \frac{5\frac{3 + 2 - 8}{24} }{7.3 - 3.4} = \frac{4 \frac{24 - 3}{24} }{3.9} = \frac{4 \frac{21}{24} }{3.9} = \frac{4 \frac{7}{8} }{3.9} = \frac{ \frac{39}{8} }{ \frac{39}{10} } = \frac{39 \times 10}{8 \times 39} = \frac{5}{4} = 1 \frac{1}{4}$

▪︎б)

$\\ \frac{12 \times 0.8 - 1.8}{2 \frac{1}{12} + 2 \frac{1}{15} - \frac{1}{4} } = \frac{9.6 - 1.8}{4 \frac{5 + 4 - 15}{60} } = \frac{7.8}{4 - \frac{6}{60} } = \frac{7.8}{4 - \frac{1}{10} } = \frac{7.8}{4 - 0.1} = \frac{7.8}{3.9} = 2$