Resposta:
[tex]a) \: \frac{2}{3} \times \frac{5}{4} \\ \\ \frac{10 \div 2}{12 \div 2} \\ \\ = \frac{5}{6} [/tex]
[tex]b) \: 2 \times \frac{2}{3} \\ \\ \frac{2}{1} \times \frac{2}{3} \\ \\ \frac{4}{3} [/tex]
[tex]c) \: \frac{3}{4} \div \frac{2}{5} \\ \\ \frac{3}{4} \times \frac{5}{2} \\ \\ \frac{15}{8} [/tex]
[tex]d) \: \frac{2}{3} \div \frac{1}{4} \\ \\ \frac{2}{3} \times \frac{4}{1} \\ \\ \frac{8}{3} [/tex]
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Resposta:
[tex]a) \: \frac{2}{3} \times \frac{5}{4} \\ \\ \frac{10 \div 2}{12 \div 2} \\ \\ = \frac{5}{6} [/tex]
[tex]b) \: 2 \times \frac{2}{3} \\ \\ \frac{2}{1} \times \frac{2}{3} \\ \\ \frac{4}{3} [/tex]
[tex]c) \: \frac{3}{4} \div \frac{2}{5} \\ \\ \frac{3}{4} \times \frac{5}{2} \\ \\ \frac{15}{8} [/tex]
[tex]d) \: \frac{2}{3} \div \frac{1}{4} \\ \\ \frac{2}{3} \times \frac{4}{1} \\ \\ \frac{8}{3} [/tex]