a) \(\frac{3,4 \cdot 10,2}{5,1 \cdot 1,17} = \frac{34.68}{5,967} = \frac{34680}{5967} = \frac{11560}{1989} \approx 5,812\)
б) \(\frac{5,6 \cdot 1\frac{1}{5}}{20 \cdot 1\frac{5}{9}} = \frac{5,6 \cdot \frac{6}{5}}{20 \cdot \frac{14}{9}} = \frac{\frac{33,6}{5}}{\frac{280}{9}} = \frac{33,6}{5} \cdot \frac{9}{280} = \frac{302,4}{1400} = 0,216\)
в) \(\frac{7,6 \cdot 0,4}{0,12} = \frac{3,04}{0,12} = \frac{304}{12} = \frac{76}{3} = 25\frac{1}{3} \approx 25,33\)
Ответы:
a) 5,812
б) 0,216
в) 25,33