Question

найдите значение выражения 1 7/9 х 3/8 - 2 5/6 х 10 51​

Answer 1

Ответ:

$1 \frac{7}{9} \times \frac{3}{8} - 2 \frac{5}{6} \times \frac{10}{51} = \frac{1 \times 9 + 7}{9} \times \frac{3}{8} - \frac{2 \times 6 + 5}{6} \times \frac{10}{51} = \frac{16}{9} \times \frac{3}{8} - \frac{17}{6} \times \frac{10}{51} = \frac{2 \times 1}{3 \times 1} - \frac{1 \times 5}{3 \times 3} = \frac{2}{3} - \frac{5}{3} = - \frac{3}{3} = - 1$