Найдем значение произведения:
- a) $$\frac{4}{9} \cdot \left(-4\frac{1}{2}\right) = \frac{4}{9} \cdot \left(-\frac{9}{2}\right) = -\frac{4 \cdot 9}{9 \cdot 2} = -\frac{4}{2} = -2$$
- б) $$-4\frac{4}{5} \cdot \left(-3\frac{1}{3}\right) = -\frac{24}{5} \cdot \left(-\frac{10}{3}\right) = \frac{24 \cdot 10}{5 \cdot 3} = \frac{240}{15} = 16$$
- в) $$2,4 \cdot \left(-\frac{3}{4}\right) = \frac{24}{10} \cdot \left(-\frac{3}{4}\right) = -\frac{24 \cdot 3}{10 \cdot 4} = -\frac{72}{40} = -\frac{9}{5} = -1,8$$
- г) $$\frac{-5}{9} \cdot 5,4 = \frac{-5}{9} \cdot \frac{54}{10} = \frac{-5 \cdot 54}{9 \cdot 10} = \frac{-270}{90} = -3$$
- д) $$-2,7 \cdot \left(-1\frac{1}{9}\right) = -\frac{27}{10} \cdot \left(-\frac{10}{9}\right) = \frac{27 \cdot 10}{10 \cdot 9} = \frac{27}{9} = 3$$
- е) $$-1\frac{2}{3} \cdot 0,125 = -\frac{5}{3} \cdot \frac{125}{1000} = -\frac{5}{3} \cdot \frac{1}{8} = -\frac{5 \cdot 1}{3 \cdot 8} = -\frac{5}{24}$$
Ответ:
- a) -2
- б) 16
- в) -1,8
- г) -3
- д) 3
- е) $$\frac{-5}{24}$$