210. Сократите дробь:

Решение:

1) \( \frac{5}{15} = \frac{5 \div 5}{15 \div 5} = \frac{1}{3} \)

2) \( \frac{6}{20} = \frac{6 \div 2}{20 \div 2} = \frac{3}{10} \)

3) \( \frac{14}{35} = \frac{14 \div 7}{35 \div 7} = \frac{2}{5} \)

4) \( \frac{21}{39} = \frac{21 \div 3}{39 \div 3} = \frac{7}{13} \)

5) \( \frac{10}{60} = \frac{10 \div 10}{60 \div 10} = \frac{1}{6} \)

6) \( \frac{28}{84} = \frac{28 \div 28}{84 \div 28} = \frac{1}{3} \)

7) \( \frac{56}{72} = \frac{56 \div 8}{72 \div 8} = \frac{7}{9} \)

8) \( \frac{20}{25} = \frac{20 \div 5}{25 \div 5} = \frac{4}{5} \)

9) \( \frac{120}{180} = \frac{120 \div 60}{180 \div 60} = \frac{2}{3} \)

10) \( \frac{207}{243} = \frac{207 \div 9}{243 \div 9} = \frac{23}{27} \)

Ответ: 1) \( \frac{1}{3} \); 2) \( \frac{3}{10} \); 3) \( \frac{2}{5} \); 4) \( \frac{7}{13} \); 5) \( \frac{1}{6} \); 6) \( \frac{1}{3} \); 7) \( \frac{7}{9} \); 8) \( \frac{4}{5} \); 9) \( \frac{2}{3} \); 10) \( \frac{23}{27} \).