a)
[tex] \frac{3}{4} \times \frac{1}{8} = \frac{3}{24} = \frac{1}{8} [/tex]
[tex] \frac{3}{4} \times \frac{3}{10} = \frac{9}{40} [/tex]
[tex] \frac{3}{4} \times 1 \frac{2}{3} = \frac{3}{4} \times \frac{5}{3} = \frac{1}{4} \times \frac{5}{1} = \frac{5}{4} = 1 \frac{1}{4} [/tex]
[tex] \frac{3}{4} \times 5 \frac{4}{7} = \frac{3}{4} \times \frac{39}{7} = \frac{117}{28} = 4 \frac{5}{28} [/tex]
b)
[tex] \frac{6}{7} \times \frac{7}{8} = \frac{3}{1} \times \frac{1}{4} = \frac{3}{4} [/tex]
[tex] \frac{6}{7} \times \frac{5}{12} = \frac{1}{7} \times \frac{5}{2} = \frac{5}{14} [/tex]
[tex] \frac{6}{7} \times 2 \frac{2}{3} = \frac{6}{7} \times \frac{8}{3} = \frac{2}{7} \times \frac{8}{1} = \frac{16}{7} = 2 \frac{2}{7} [/tex]
[tex] \frac{6}{7} \times 6 \frac{5}{7} = \frac{6}{7} \times \frac{47}{7} = \frac{282}{49} = 5 \frac{37}{49} [/tex]
c)
[tex]1 \frac{2}{5} \times \frac{5}{3} = \frac{7}{5} \times \frac{5}{3} = \frac{7}{1} \times \frac{1}{3} = \frac{7}{3} = 2 \frac{1}{3} [/tex]
[tex]1 \frac{2}{5} \times \frac{4}{7} = \frac{7}{5} \times \frac{4}{7} = \frac{1}{5} \times \frac{4}{1} = \frac{4}{5} [/tex]
[tex] 1\frac{2}{5} \times 1 \frac{3}{7} = \frac{7}{5} \times \frac{10}{7} = \frac{1}{1} \times \frac{2}{1} = 2[/tex]
[tex]1 \frac{2}{5} \times 5 \frac{5}{12} = \frac{7}{5} \times \frac{65}{12} = \frac{7}{1} \times \frac{13}{12} = \frac{91}{12} = 7 \frac{7}{12} [/tex]
Myślę że pomogłem ;)
