7. Закончите записи вычислений: 2-1\frac{1}{3} = 6-3\frac{3}{4} = 9-7\frac{1}{2} = 12-6\frac{3}{10} = 5\frac{3}{8} +2\frac{7}{8} = 7+(\frac{3}{8} +\frac{7}{8} )=7+\frac{10}{8} =7+1\frac{2}{8} = 9-2\frac{1}{4} =8\frac{4}{4} -2\frac{1}{4} = 3\frac{2}{7} -1\frac{4}{7} =2\frac{9}{7} -1\frac{4}{7} = 4\frac{3}{10} -1\frac{7}{10} = 1-\frac{8}{15} =

Ответ:

1. \(2-1\frac{1}{3}=1\frac{3}{3}-1\frac{1}{3}=\frac{2}{3}\)

2. \(6-3\frac{3}{4}=5\frac{4}{4}-3\frac{3}{4}=2\frac{1}{4}\)

3. \(9-7\frac{1}{2}=8\frac{2}{2}-7\frac{1}{2}=1\frac{1}{2}\)

4. \(12-6\frac{3}{10}=11\frac{10}{10}-6\frac{3}{10}=5\frac{7}{10}\)

5. \(5\frac{3}{8} +2\frac{7}{8} = 7+(\frac{3}{8} +\frac{7}{8} )=7+\frac{10}{8} =7+1\frac{2}{8} =8\frac{2}{8}\)

6. \(9-2\frac{1}{4} =8\frac{4}{4} -2\frac{1}{4} =6\frac{3}{4}\)

7. \(3\frac{2}{7} -1\frac{4}{7} =2\frac{9}{7} -1\frac{4}{7} =1\frac{5}{7}\)

8. \(4\frac{3}{10} -1\frac{7}{10} =3\frac{13}{10}-1\frac{7}{10}=2\frac{6}{10}\)

9. \(1-\frac{8}{15} =\frac{15}{15}-\frac{8}{15}=\frac{7}{15}\)

Ответ: 2/3, 2 1/4, 1 1/2, 5 7/10, 8 2/8, 6 3/4, 1 5/7, 2 6/10, 7/15