Question

1 7/8*(-1 7/9)-4 2/9*(-3/8)

Answer 1

$\boxed{ - 1 \frac{3}{4} }$

Объяснение:

$1 \frac{7}{8} \times ( - 1 \frac{7}{9 } ) - 4 \frac{2}{9} \times ( - \frac{3}{8} ) = \frac{15}{8} \times ( - \frac{16}{9} ) - \frac{38}{9} \times ( - \frac{3}{8} ) = \\ \\ = - 5 \times \frac{2}{3} + \frac{19}{3} \times \frac{1}{4} = - \frac{10}{3} + \frac{19}{12} = \frac{ - 40 + 19}{12} = - \frac{21}{12} = \boxed{ - \frac{7}{4} = - 1 \frac{3}{4} }$