a)
[tex]3 \frac{1}{2} \times 1 \frac{1}{3} = \frac{7}{2} \times \frac{4}{3} = \frac{7}{1} \times \frac{2}{3} = \frac{14}{3} = 4 \frac{2}{3} [/tex]
b)
[tex]2 \frac{2}{3} \times 2 \frac{1}{7} = \frac{8}{3} \times \frac{15}{7} = \frac{8}{1} \times \frac{5}{7} = \frac{40}{7} = 5 \frac{5}{7} [/tex]
c)
[tex]2 \frac{3}{4} \times 3 \frac{1}{3} = \frac{11}{4} \times \frac{10}{3} = \frac{110}{12} = 9 \frac{2}{12} = 9 \frac{1}{6} [/tex]
d)
[tex]2 \frac{2}{9} \times 3 \frac{2}{5} = \frac{20}{9} \times \frac{17}{5} = \frac{4}{9} \times \frac{17}{1} = \frac{68}{9} = 7 \frac{5}{9} [/tex]
