Выполните умножение: 1) \frac{9}{35} \cdot 8; 2) \frac{7}{24} \cdot 16; 3) 42 \cdot \frac{4}{7}; Найдите произведение: 1) \frac{6}{11} \cdot \frac{4}{7}; 2) \frac{7}{20} \cdot \frac{10}{21}; 3) \frac{8}{9} \cdot \frac{27}{32}; 4) \frac{23}{28} \cdot \frac{49}{46}; 5) \frac{34}{86} \cdot \frac{43}{51}; 6) \frac{7}{18} \cdot \frac{90}{77};

Выполним умножение: 1) $$rac{9}{35} \cdot 8 = \frac{9 \cdot 8}{35} = \frac{72}{35} = 2\frac{2}{35}$$ 2) $$rac{7}{24} \cdot 16 = \frac{7 \cdot 16}{24} = \frac{7 \cdot 2}{3} = \frac{14}{3} = 4\frac{2}{3}$$ 3) $$42 \cdot \frac{4}{7} = \frac{42 \cdot 4}{7} = 6 \cdot 4 = 24$$ Найдем произведение: 1) $$rac{6}{11} \cdot \frac{4}{7} = \frac{6 \cdot 4}{11 \cdot 7} = \frac{24}{77}$$ 2) $$rac{7}{20} \cdot \frac{10}{21} = \frac{7 \cdot 10}{20 \cdot 21} = \frac{1 \cdot 1}{2 \cdot 3} = \frac{1}{6}$$ 3) $$rac{8}{9} \cdot \frac{27}{32} = \frac{8 \cdot 27}{9 \cdot 32} = \frac{1 \cdot 3}{1 \cdot 4} = \frac{3}{4}$$ 4) $$rac{23}{28} \cdot \frac{49}{46} = \frac{23 \cdot 49}{28 \cdot 46} = \frac{1 \cdot 7}{4 \cdot 2} = \frac{7}{8}$$ 5) $$rac{34}{86} \cdot \frac{43}{51} = \frac{34 \cdot 43}{86 \cdot 51} = \frac{17 \cdot 43}{43 \cdot 51} = \frac{17}{51} = \frac{1}{3}$$ 6) $$rac{7}{18} \cdot \frac{90}{77} = \frac{7 \cdot 90}{18 \cdot 77} = \frac{1 \cdot 5}{1 \cdot 11} = \frac{5}{11}$$