1. a) 6$$\frac{2}{7}$$+1 б) 5 - $$\frac{1}{3}$$ в) 7$$\frac{5}{8}$$+3$$\frac{1}{8}$$ г) 5$$\frac{3}{10}$$-2$$\frac{1}{5}$$

1. а) $$6\frac{2}{7}+1 = 7\frac{2}{7}$$

Ответ: $$7\frac{2}{7}$$

1. б) $$5-\frac{1}{3} = \frac{5 \cdot 3}{3}-\frac{1}{3} = \frac{15}{3} - \frac{1}{3} = \frac{15-1}{3} = \frac{14}{3} = 4\frac{2}{3}$$

Ответ: $$4\frac{2}{3}$$

• в) $$7\frac{5}{8}+3\frac{1}{8} = (7+3)+(\frac{5}{8}+\frac{1}{8}) = 10+\frac{6}{8} = 10\frac{6}{8} = 10\frac{3}{4}$$

Ответ: $$10\frac{3}{4}$$

1. г) $$5\frac{3}{10}-2\frac{1}{5} = 5\frac{3}{10}-2\frac{1 \cdot 2}{5 \cdot 2} = 5\frac{3}{10}-2\frac{2}{10} = (5-2)+(\frac{3}{10}-\frac{2}{10}) = 3 + \frac{1}{10} = 3\frac{1}{10}$$

Ответ: $$3\frac{1}{10}$$