Question

16. Efetue as multiplicações: 1/2 x 8/8 = b) 4/7 x 2/5 = c) 5/3 x 2/7 = d)3/7 x 1/5 = e)1/8 x 1/9 = f) 7/5 x 2/3 = g) 3/5 x 1/2 =

Answer 1

Resposta:

$a)\frac{1}{2} .\frac{8}{8} =\frac{1}{2} .1=\frac{1}{2}$

$b)\frac{4}{7} .\frac{2}{5} =\frac{4.2}{7.5} =\frac{8}{35}$

$c)\frac{5}{3} .\frac{2}{7} =\frac{5.2}{3.7} =\frac{10}{21}$

$d)\frac{3}{7} .\frac{1}{5} =\frac{3.1}{7.5} =\frac{3}{35}$

$e)\frac{1}{8} .\frac{1}{9} =\frac{1.1}{8.9} =\frac{1}{72}$

$f)\frac{7}{5} .\frac{2}{3} =\frac{7.2}{5.3} =\frac{14}{15}$

$g)\frac{3}{5} .\frac{1}{2} =\frac{3.1}{5.2} =\frac{3}{10}$