Question

Efetue as multiplicações:
a)(+1/5)x(+4/3)=
b)(+4/5)x(-1/3)=
c)(-5/8)x(-4/3)=

Answer 1

a) $\frac{1}{5} . \frac{4}{3} = \frac{4}{15}$

b) $\frac{4}{5} . \frac{-1}{3} = \frac{-4}{15}$

c) $\frac{-5}{8} . \frac{-4}{3} = \frac{+20}{24}$

Answer 2

$a ) ( +\frac{1}{5} ) . (+ \frac{4}{3} ) = \boxed{+ \frac{4}{15} } \\ \\ b ) (+ \frac{4}{5} ). (-\frac{1}{3} ) = \boxed{ -\frac{4}{15} } \\ \\ c )(- \frac{5}{8} ) . ( - \frac{4}{3} ) = \boxed{+\frac{20}{24} \to +\frac{5}{6} }$