Calculati:


[tex] - \frac{7}{3} \times ( - \frac{15}{28} ) = [/tex]

[tex] \frac{11}{3} \times \frac{21}{55} \times \frac{5}{7} [/tex]

[tex] \frac{3}{28} \times ( \frac{7}{5} ) = [/tex]

[tex] - \frac{7}{15} \times ( \frac{5}{28} ) \times \frac{8}{21} = [/tex]

[tex]( - 4 )\times \frac{3}{16} \times ( - \frac{2}{9} ) = [/tex]

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