d)
[tex]2 \frac{4}{5} \times 3 \frac{2}{3} = \frac{14}{5} \times \frac{11}{3} = \frac{154}{15} = 10 \frac{4}{15} [/tex]
e)
[tex]1 \frac{2}{3} \times 2 \frac{1}{7} = \frac{5}{3} \times \frac{15}{7} = \frac{5}{1} \times \frac{5}{7} = \frac{25}{7} = 3 \frac{4}{7} [/tex]
f)
[tex]3 \frac{1}{4} \times 1 \frac{2}{5} = \frac{13}{4} \times \frac{7}{5} = \frac{91}{20} = 4 \frac{11}{20} [/tex]
Myślę że pomogłem ;)
