Question

1) Efetue os cálculos simplificando-os quando possível

A) 6.3/4

B) 5/7 . 9/2

C) 1/8 . 14

D) 2/3 . 5/7

E) 6/7 . 3 . 9/5

F) 8. 5/4. 2

Answer 1

$6 \times \frac{3}{4} = \frac{18}{4} = \frac{9}{2}$

$\frac{5}{7} \times \frac{9}{2} = \frac{45}{14}$

$\frac{1}{8} \times 14 = \frac{14}{8} = \frac{7}{4}$

$\frac{2}{3} \times \frac{5}{7} = \frac{10}{21}$

$\frac{6}{7} \times 3 \times \frac{9}{5} = \frac{162}{35}$

$8 \times \frac{5}{4} \times 2 = \frac{80}{4} = 20$