(-2 1/8)*(-1 29/51)+(-1 23/42)*3 1/13-(-4 2/3)

Решите задачу:

$1) - 2 \frac{1}{8} \times ( - 1 \frac{29}{51} ) = \\ \frac{17}{8} \times \frac{80}{51} = \frac{10}{3} = 3 \frac{1}{3}$

$2) - 1 \frac{23}{42} \times 3 \frac{1}{13} = - \frac{65}{42} \times \frac{40}{13} = \\ - \frac{5 \times 20}{21} = - \frac{100}{21} = - 4 \frac{16}{21}$

$3)3 \frac{1}{3} - 4 \frac{16}{21} = 3 \frac{7}{21} - 4 \frac{16}{21} = \\ - 1 \frac{9}{21} = - 1 \frac{3}{7}$

$4) - 1 \frac{3}{7} - ( - 4 \frac{2}{3} ) = \\ - 1 \frac{9}{21} + 4 \frac{14}{21} = 3 \frac{5}{21}$