Question

1 2/15-2 3/10- 1 1/6=​

Answer 1

Ответ:

$1 \frac{2}{15} - 2 \frac{3}{10} - 1 \frac{1}{6} = - 2 \frac{1}{3} \\ (1) = 1 \frac{2}{15} - 2 \frac{3}{10} = 1 \frac{1}{6} \\ 15 = 3 \times 5 \\ 10 = 2 \times 5$

НОК = 15 × 2 = 30

$1 \frac{2 \times 2}{30} - 2 \frac{3 \times 3}{30} = 1 \: - 2 \: - \frac{9 - 4}{30} = - 1 \frac{5}{30} \\ - 1 \frac{5}{30} = - 1 \frac{5}{2 \times 3 \times 5} = - 1 \frac{1}{6} \\ (2) = - 1 \frac{1}{6} - 1 \frac{1}{6} = - 2 \frac{1}{3} \\ 1 \frac{1}{6 } + 1 \frac{1}{6} = 2 \frac{1}{3} \\ 1 \frac{1 \times 1}{6} + 1 \frac{1 \times 1}{6} = 1 + 1 \frac{1 + 1}{6} = 2 \frac{2}{6} = 2 \frac{1}{3} \\ 2 \frac{2}{6} = 2 \frac{2 }{2 \times 3} = 2 \frac{1}{3}$