3. Сократите дроби 10/15, 12/18, 24/48, 28/35 8*11/33*4 18*25/75*12 6*7+7*5/49

Решение:

3. Сокращение дробей:

1. \(\frac{10}{15} = \frac{10 \div 5}{15 \div 5} = \frac{2}{3}\)
2. \(\frac{12}{18} = \frac{12 \div 6}{18 \div 6} = \frac{2}{3}\)
3. \(\frac{24}{48} = \frac{24 \div 24}{48 \div 24} = \frac{1}{2}\)
4. \(\frac{28}{35} = \frac{28 \div 7}{35 \div 7} = \frac{4}{5}\)
5. \(\frac{8 \cdot 11}{33 \cdot 4} = \frac{8 \cdot 11}{3 \cdot 11 \cdot 4} = \frac{8}{12} = \frac{8 \div 4}{12 \div 4} = \frac{2}{3}\)
6. \(\frac{18 \cdot 25}{75 \cdot 12} = \frac{18 \cdot 25}{3 \cdot 25 \cdot 12} = \frac{18}{36} = \frac{18 \div 18}{36 \div 18} = \frac{1}{2}\)
7. \(\frac{6 \cdot 7 + 7 \cdot 5}{49} = \frac{42 + 35}{49} = \frac{77}{49} = \frac{77 \div 7}{49 \div 7} = \frac{11}{7}\)

Ответ:
\(\frac{2}{3}, \frac{2}{3}, \frac{1}{2}, \frac{4}{5}, \frac{2}{3}, \frac{1}{2}, \frac{11}{7}\)