Question

alguém sabe me responde​

Answer 1

Resposta:

1.

a) $\frac{3}{1} .\frac{2}{5} = \frac{6}{5}$                b) $\frac{6}{1} .\frac{2}{7} = \frac{12}{7}$

c) $\frac{2}{1} .\frac{1}{4} =\frac{2}{4} = \frac{1}{2}$          d) $\frac{5}{1} .\frac{2}{9} =\frac{10}{9}$

2.

a) $\frac{2}{3} .\frac{8}{12} =\frac{16}{36} = \frac{4}{9}$     b) $\frac{6}{15} .\frac{8}{17} =\frac{48}{255} = \frac{16}{85}$

c) $\frac{4}{9} .\frac{2}{9} =\frac{8}{81}$              d) $\frac{7}{11} .\frac{25}{5} =\frac{175}{55} = \frac{35}{11}$