1 3/4 * 6/5;

Привет! Давай решим примеры. 1. $\frac{3}{4} \cdot \frac{6}{5} = \frac{18}{20} = \frac{9}{10} = 0,9$ 2. $\frac{12}{5} : \frac{15}{2} = \frac{12}{5} \cdot \frac{2}{15} = \frac{24}{75} = \frac{8}{25} = 0,32$ 3. $\frac{1}{4} - \frac{3}{25} = \frac{25-12}{100} = \frac{13}{100} = 0,13$ 4. $\frac{14}{25} + \frac{3}{2} = \frac{28+75}{50} = \frac{103}{50} = 2,06$ 5. $9,3 + 7,8 = 17,1$ 6. $5,7 - 7,6 = -1,9$ 7. $5,2 \cdot 3,1 = 16,12$ 8. $\frac{8,2}{4,1} = 2$ 9. $\frac{1}{30} + \frac{1}{42} = \frac{7+5}{210} = \frac{12}{210} = \frac{2}{35}$ 10. $(\frac{17}{10} - \frac{1}{20}) \cdot \frac{2}{15} = (\frac{34-1}{20}) \cdot \frac{2}{15} = \frac{33}{20} \cdot \frac{2}{15} = \frac{33 \cdot 2}{20 \cdot 15} = \frac{66}{300} = \frac{11}{50} = 0,22$ 11. $(2,6 \cdot 10^{-2}) \cdot (9 \cdot 10^{-3}) = (2,6 \cdot 9) \cdot 10^{-2-3} = 23,4 \cdot 10^{-5} = 0,000234$