Question

пж помогите даю 100 баллов​

Answer 1

$(12 \frac{5}{12} + 1 \frac{2}{3 } - 3 \frac{5}{6} + 2 \frac{3}{4} ) \div (2 \frac{1}{2} \times \frac{2}{5} - \frac{7}{9} ) = 58 \frac{1}{2} \\ 1) \: 12 \frac{5}{12} + 1 \frac{2}{3} - 3 \frac{5}{6} + 2 \frac{3}{4} = 12 \frac{5}{12} + 1 \frac{8}{12} - 3 \frac{10}{12} + 2 \frac{9}{12} = \\ = 15 \frac{22}{12} - 3 \frac{10}{12} = 12 \frac{12}{12} = 13 \\ 2) \: 2 \frac{1}{2} \times \frac{2}{5} = \frac{5 \times 2}{2 \times 5} = 1 \\ 3) \: 1 - \frac{7}{9} = \frac{9}{9} - \frac{7}{9} = \frac{2}{9 } \\ 4) \: 13 \div \frac{2}{9} = \frac{13 \times 9}{2} = \frac{117}{2} = 58 \frac{1}{2}$