Question

Resolver a expressão numérica abaixo:
a)  -1/2 × 3/4 × 5/6     b)1/2 ÷ 3/4 ÷ 5/6

Answer 1

$a) ( \frac{-1}{2} ) . \frac{3}{4} . \frac{5}{6} = \frac{-15}{48} = \frac{-15:3}{48:3} =- \frac{5}{16}$

$b) \frac{1}{2} : \frac{3}{4} : \frac{5}{6} = \frac{1}{2} . \frac{4}{3} . \frac{6}{5} = \frac{24}{30} = \frac{24:6}{30:6} = \frac{4}{5}$