Выполните действия: 3 8윽-27= 6 8 12 23 23 100+6= 15-20 = 3

Выполним действия:

1. $$8\frac{3}{7} - 2\frac{1}{7} = (8 - 2) + (\frac{3}{7} - \frac{1}{7}) = 6 + \frac{2}{7} = 6\frac{2}{7}$$
2. $$6\frac{8}{23} - \frac{12}{23} = 6 + \frac{8}{23} - \frac{12}{23} = 6 - \frac{4}{23} = 5\frac{23}{23} - \frac{4}{23} = 5\frac{19}{23}$$
3. $$10\frac{3}{5} + 6\frac{4}{5} = (10 + 6) + (\frac{3}{5} + \frac{4}{5}) = 16 + \frac{7}{5} = 16 + 1\frac{2}{5} = 17\frac{2}{5}$$
4. $$15 - 2\frac{3}{5} = 14\frac{5}{5} - 2\frac{3}{5} = (14 - 2) + (\frac{5}{5} - \frac{3}{5}) = 12\frac{2}{5}$$

Ответ:

1. $$6\frac{2}{7}$$
2. $$5\frac{19}{23}$$
3. $$17\frac{2}{5}$$
4. $$12\frac{2}{5}$$