Obliczenia :
[tex]a] \ 4\cdot5\frac{1}{3}=4\cdot\frac{16}{3}=\frac{64}{3}=21\frac{1}{3}\\\\b] \ 9\cdot3\frac{1}{5}=9\cdot\frac{16}{5}=\frac{144}{5}=28\frac{4}{5}\\\\c] \ 2\frac{3}{7}\cdot4=\frac{17}{7}\cdot4=\frac{68}{7}=9\frac{5}{7}\\\\d] \ 3\frac{2}{9}\cdot5=\frac{29}{9}\cdot5=\frac{145}{9}=16\frac{1}{9}\\\\e] \ 4\frac{1}{4}\cdot7=\frac{17}{4}\cdot7=\frac{119}{4}=29\frac{3}{4}\\\\f] \ 6\cdot2\frac{5}{12}=6\cdot\frac{29}{12}=\frac{29}{2}=14\frac{1}{2}[/tex]
