Question

ОЧЕНЬ СРОЧНО ДАЮ 50 БАЛОВ

Answer 1

15)

$23 \div (6 \frac{5}{17} + 1 \frac{12}{17} ) - (4 \frac{2}{5} - 2 \frac{3}{5} ) \div 5 =2 \frac{103}{200} \\ 1) \: 6 \frac{5}{17} + 1 \frac{12}{17} = 7 \frac{17}{17} = 8 \\ 2) \: 23 \div 8 = 2 \frac{7}{8} \\ 3) \: 4 \frac{2}{5} - 2 \frac{3}{5} = 3 \frac{7}{5} - 2 \frac{3}{5} = 1 \frac{4}{5} \\ 4) \: 1 \frac{4}{5} \div 5 = \frac{9}{5 \times 5} = \frac{9}{25} \\ 5) \: 2 \frac{7}{8} - \frac{9}{25} = 2 \frac{175}{200} - \frac{72}{200} = 2 \frac{103}{200}$

16)

$(7 \frac{4}{13} - 4 \frac{4}{13} ) \div 0.15 - 4 \div (13 \frac{6}{13} + 11 \frac{7}{13} ) = 19.84\\ 1) \: 7 \frac{4}{13} - 4 \frac{4}{13} = 3 \\ 2) \: 3 \div 0.15 = 300 \div 15 = 20 \\ 3) \: 13 \frac{6}{13} + 11 \frac{7}{13} = 25 \\4) \: 4 \div 25 = \frac{4}{25} = 0.16 \\ 5) \: 20 - 0.16 = 19.84$