Cześć!
a) [tex]1\frac{2}{7} * (-2 \frac{1}{3} ) = \frac{9}{7} * (-\frac{7}{3} ) = \frac{3}{1} * (-\frac{1}{1} ) = -3[/tex]
b) [tex](-12\frac{2}{3}) : (-3 \frac{1}{6} ) = \frac{38}{3} : \frac{19}{6} = \frac{38}{3} * \frac{6}{19} = \frac{38}{1} * \frac{2}{19} = \frac{2}{1} * \frac{2}{1} = 4[/tex]
Pamiętaj! :
- oraz - daje +
- oraz + daje -
Pozdrawiam :)
