Б. 1) $$3\frac{2}{5} - \frac{7}{10} =$$ 2) $$6\frac{4}{9} - \frac{11}{18} =$$ 3) $$7\frac{1}{4} - \frac{5}{6} =$$ 4) $$3\frac{2}{15} - \frac{3}{10} =$$ 5) $$4\frac{5}{12} - 1\frac{3}{4} =$$ 6) $$5\frac{1}{4} - 1\frac{1}{2} =$$ 7) $$8\frac{1}{3} - 1\frac{7}{18} =$$

Решим представленные примеры:

1. $$3\frac{2}{5} - \frac{7}{10} = 3\frac{4}{10} - \frac{7}{10} = 2\frac{14}{10} - \frac{7}{10} = 2\frac{7}{10}$$
2. $$6\frac{4}{9} - \frac{11}{18} = 6\frac{8}{18} - \frac{11}{18} = 5\frac{26}{18} - \frac{11}{18} = 5\frac{15}{18} = 5\frac{5}{6}$$
3. $$7\frac{1}{4} - \frac{5}{6} = 7\frac{3}{12} - \frac{10}{12} = 6\frac{15}{12} - \frac{10}{12} = 6\frac{5}{12}$$
4. $$3\frac{2}{15} - \frac{3}{10} = 3\frac{4}{30} - \frac{9}{30} = 2\frac{34}{30} - \frac{9}{30} = 2\frac{25}{30} = 2\frac{5}{6}$$
5. $$4\frac{5}{12} - 1\frac{3}{4} = 4\frac{5}{12} - 1\frac{9}{12} = 3\frac{17}{12} - 1\frac{9}{12} = 2\frac{8}{12} = 2\frac{2}{3}$$
6. $$5\frac{1}{4} - 1\frac{1}{2} = 5\frac{1}{4} - 1\frac{2}{4} = 4\frac{5}{4} - 1\frac{2}{4} = 3\frac{3}{4}$$
7. $$8\frac{1}{3} - 1\frac{7}{18} = 8\frac{6}{18} - 1\frac{7}{18} = 7\frac{24}{18} - 1\frac{7}{18} = 6\frac{17}{18}$$