Question

помогите я не понимаю

Answer 1

$3 \frac{3}{10} \div ( \frac{8}{25} + \frac{9}{20} ) - 1 \frac{29}{35} \times 1 \frac{1}{4} = 2 \\ \frac{8}{25} + \frac{9}{20} = \frac{32}{100} + \frac{45}{100} = \frac{77}{100} \\ 3 \frac{3}{10} \div \frac{77}{100} = \frac{33 \times 100}{10 \times 77} = \frac{3 \times 10}{1 \times 7} = \frac{30}{7} = 4 \frac{2}{7} \\ 1 \frac{29}{35} \times 1 \frac{1}{4} = \frac{64 \times 5}{35 \times 4} = \frac{16 \times 1}{7 \times 1} = \frac{16}{7} = 2 \frac{2}{7} \\ 4 \frac{2}{7} - 2 \frac{2}{7} = 2$