Question

quanto e (a) 5/9•7/8 (B) 3/5•3/4 (C)1•1/5•2/3 (D) 4/3•7/2•3/2

Answer 1

a) $\frac{5}{9} . \frac{7}{8} = \frac{5.7}{9.8 } = \frac{35}{72}$

b) $\frac{3}{5} . \frac{3}{4} = \frac{3.3}{5.4} = \frac{9}{20}$

c)Perceba que 1 = 1/1
 $1. \frac{1}{5} . \frac{2}{3} = \frac{1.1.2}{1.5.3} = \frac{2}{15}$

d) $\frac{4}{3} . \frac{7}{2} . \frac{3}{2} = \frac{4.7.3}{3.2.2} = \frac{84}{12} = 7$

Answer 2

a) (5/9) . (7/8) = 0,56 . 0.88 = 0,49
b) (3/5) . (3/4) = 0,60 . 0,75 = 0,45
c) 1 . (1/5) . (2/3) = 1 . 0,20 . 0,67 = 0,13
d) (4/3) . (7/2) . (3/2) = 1,33 . 3,50 . 1,50 = 6,98