Question

Найдите значения выражения
2 5/6 * 2 7/8 + 2 7/8 * 1/3 - 2 1/2 *2 7/8

Answer 1

$2 \frac{5}{6} \times 2 \frac{7}{8} + 2 \frac{7}{8} \times \frac{1}{3} - 2 \frac{1}{2} \times2 \frac{7}{8} = 2 \frac{7}{8} \times (2 \frac{5}{6} + \frac{1}{3} - 2 \frac{1}{2} ) = 2 \frac{7}{8} \times (2 \frac{5}{6} + \frac{2}{6} - 2 \frac{3}{6} ) = 2 \frac{7}{8} \times (2 \frac{7}{6} - 2 \frac{3}{6} ) = 2 \frac{7}{8} \times \frac{4}{6} = \frac{23 \times 2}{8 \times 3} = \frac{23}{4 \times 3} = \frac{23}{12} = 1 \frac{11}{12}$