cuanto es?
[tex]a) \frac{28}{27 } \div \frac{49}{18} = [/tex]
[tex]b) - \frac{9}{4} \div ( - \frac{21} {10}) = [/tex]
[tex]c) \frac{32}{45} \div ( - \frac{16}{75} ) = [/tex]
[tex]d) - \frac{100}{27} \div \frac{50}{81} = [/tex]
[tex]e) - \frac{36}{77} \div ( - \frac{24}{55} ) = [/tex]
[tex]f) - \frac{40}{54} \div ( - \frac{120}{21} ) = [/tex]





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