1) \(0,8 \cdot \frac{7}{12} = \frac{8}{10} \cdot \frac{7}{12} = \frac{4}{5} \cdot \frac{7}{12} = \frac{4 \cdot 7}{5 \cdot 12} = \frac{1 \cdot 7}{5 \cdot 3} = \frac{7}{15}\)
2) \(1 \frac{2}{3} \cdot 0,6 = \frac{5}{3} \cdot \frac{6}{10} = \frac{5 \cdot 6}{3 \cdot 10} = \frac{1 \cdot 2}{1 \cdot 2} = 1\)
3) \(1,25 \cdot \frac{32}{45} = \frac{125}{100} \cdot \frac{32}{45} = \frac{5}{4} \cdot \frac{32}{45} = \frac{5 \cdot 32}{4 \cdot 45} = \frac{1 \cdot 8}{1 \cdot 9} = \frac{8}{9}\)
4) \(4,5 \cdot 3 \frac{1}{3} = \frac{45}{10} \cdot \frac{10}{3} = \frac{45 \cdot 10}{10 \cdot 3} = \frac{15 \cdot 1}{1 \cdot 1} = 15\)
Ответ:
1) 7/15
2) 1
3) 8/9
4) 15
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