Răspuns:
a)
[tex] \frac{1}{7} \times \frac{7}{2} = \frac{1}{2} [/tex]
b)
[tex] \frac{4}{5} \times \frac{5}{4} = 1 [/tex]
c)
[tex] \frac{2}{27} \times \frac{9}{4} = \frac{1}{6} [/tex]
d)
[tex] \frac{5}{13} \times \frac{39}{75} = \frac{3}{15} = \frac{1}{5} [/tex]
e)
[tex] \frac{8}{11} \times \frac{55}{56} = \frac{5}{7} [/tex]
f)
[tex] \frac{2}{5} \times \frac{37}{4} = \frac{37}{10} = 3 \frac{7}{10} [/tex]
g)
[tex] \frac{40}{13} \times \frac{39}{8} = 15[/tex]
h)
[tex] \frac{5}{3} \times \frac{11}{5} = \frac{11}{3} = 3 \frac{2}{3} [/tex]