Задание 109. Найдите разность.
1) Невозможно прочитать условие.
2) $$6 - \frac{4}{7} = \frac{6 \cdot 7}{7} - \frac{4}{7} = \frac{42 - 4}{7} = \frac{38}{7} = 5\frac{3}{7}$$
Ответ: $$6 - \frac{4}{7} = 5\frac{3}{7}$$
3) $$11 - \frac{6}{10} = \frac{11 \cdot 10}{10} - \frac{6}{10} = \frac{110 - 6}{10} = \frac{104}{10} = 10\frac{4}{10} = 10\frac{2}{5}$$
Ответ: $$11 - \frac{6}{10} = 10\frac{2}{5}$$
6) $$2 - \frac{11}{21} = \frac{2 \cdot 21}{21} - \frac{11}{21} = \frac{42 - 11}{21} = \frac{31}{21} = 1\frac{10}{21}$$
Ответ: $$2 - \frac{11}{21} = 1\frac{10}{21}$$
7) $$8 - \frac{3}{10} = \frac{8 \cdot 10}{10} - \frac{3}{10} = \frac{80 - 3}{10} = \frac{77}{10} = 7\frac{7}{10}$$
Ответ: $$8 - \frac{3}{10} = 7\frac{7}{10}$$
8) $$5 - \frac{9}{20} = \frac{5 \cdot 20}{20} - \frac{9}{20} = \frac{100 - 9}{20} = \frac{91}{20} = 4\frac{11}{20}$$
Ответ: $$5 - \frac{9}{20} = 4\frac{11}{20}$$