Question

me ajudem nesse lição, por favor!

Answer 1

a)
$\frac{1}{3} \times \frac{4}{7} = \frac{1 \times 4}{3 \times 7} = \frac{4}{21}$
b)
$\frac{7}{8} \times \frac{3}{2} = \frac{7 \times 3}{8 \times 2} = \frac{21}{16}$
c)
$\frac{3}{5} \times \frac{5}{9} = \frac{1}{3}$
d)
$\frac{2}{7} \times \frac{11}{2} = \frac{1}{7} \times 11 = \frac{11}{7}$
e)
$\frac{9}{8} \times \frac{4}{45} = \frac{1}{2} \times \frac{1}{5} = \frac{1}{10}$
f)
$\frac{4}{45} \times \frac{9}{8} = \frac{1}{5} \times \frac{1}{2} = \frac{1}{10}$
g)
$\frac{45}{4} \times \frac{8}{9} = 5 \times 2 = 10$
h)
$\frac{8}{9} \times \frac{45}{4} = 2 \times 5 = 10$
Espero Ter Ajudado!!