Resposta:
A)
[tex] \frac{9}{2} \div \frac{4}{5} = \frac{9}{2} \times \frac{5}{4} = \frac{45}{8} [/tex]
B)
[tex] \frac{6}{8} \div \frac{7}{4} = \frac{6}{8} \times \frac{4}{7} = \frac{24}{56} [/tex]
C)
[tex] \frac{10}{3} \div \frac{5}{9} = \frac{10}{3} \times \frac{9}{5} = \frac{90}{15} [/tex]
D)
[tex] \frac{3}{4} \div \frac{1}{2} = \frac{3}{4} \times \frac{2}{1} = \frac{6}{4} [/tex]
espero ter ajudado, bons estudos
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