5.335 Приведите к несократимой дроби: 2.7 3.5 9.4 11.5. a) 6.5' 7.3' 4.7' 3.11 4.3 2.3 21.6 3.7 б) 7.8'3.10' 21.7' 21.24

a) $$\frac{2 \cdot 7}{6 \cdot 5} = \frac{14}{30} = \frac{14:2}{30:2} = \frac{7}{15}$$

$$\frac{3 \cdot 5}{7 \cdot 3} = \frac{15}{21} = \frac{15:3}{21:3} = \frac{5}{7}$$

$$\frac{9 \cdot 4}{4 \cdot 7} = \frac{36}{28} = \frac{36:4}{28:4} = \frac{9}{7}$$

$$\frac{11 \cdot 5}{3 \cdot 11} = \frac{55}{33} = \frac{55:11}{33:11} = \frac{5}{3}$$

б) $$\frac{4 \cdot 3}{7 \cdot 8} = \frac{12}{56} = \frac{12:4}{56:4} = \frac{3}{14}$$

$$\frac{2 \cdot 3}{3 \cdot 10} = \frac{6}{30} = \frac{6:6}{30:6} = \frac{1}{5}$$

$$\frac{21 \cdot 6}{21 \cdot 7} = \frac{126}{147} = \frac{126:21}{147:21} = \frac{6}{7}$$

$$\frac{3 \cdot 7}{21 \cdot 24} = \frac{21}{504} = \frac{21:21}{504:21} = \frac{1}{24}$$

Ответ: а) $$\frac{7}{15}$$, $$\frac{5}{7}$$, $$\frac{9}{7}$$, $$\frac{5}{3}$$; б) $$\frac{3}{14}$$, $$\frac{1}{5}$$, $$\frac{6}{7}$$, $$\frac{1}{24}$$