Explicație pas cu pas:
a)
[tex]- \frac{8}{7} \cdot \left( - \frac{21}{40} \right) = \frac{\not 8\cdot3\cdot\not 7}{\not 7\cdot\not 8\cdot5} =\bf \frac{3}{5} \\ [/tex]
b)
[tex]\frac{6}{11} \cdot \left( -\frac{22}{3} \right) \cdot \frac{9}{10} = - \frac{2\cdot3 \cdot \not 2\cdot\not 11 \cdot 3\cdot\not 3}{\not 11 \cdot \not 3 \cdot \not 2\cdot5} =\bf - \frac{18}{5}\\ [/tex]
c)
[tex]- \frac{26}{33} \cdot \frac{22}{13} \cdot \frac{3}{2} = - \frac{2\cdot \not 13}{\not 3\cdot\not 11} \cdot \frac{\not 2\cdot\not 11}{\not 13} \cdot \frac{\not 3}{\not 2} =\bf - 2 \\ [/tex]
d)
[tex] - 5\cdot\frac{3}{10} \left( - \frac{2}{9}\right) = \frac{\not 5 \cdot\not 3\cdot\not 2 }{\not 2\cdot\not 5\cdot\not 3\cdot3} = \bf \frac{1}{3} \\ [/tex]
