Question

Resolva

A) (-10) (DIVISÃO) (+6)

B) (-8,1) (DIVISÃO) (+0,04)

3
C) (-1,5)

2
D) (-8,2)

E) (-20) (DIVISÃO) (-1,6)

Answer 1

$a) - 10 \div + 6 = - (10 \div 6) = \boxed{- 1.66667...} = - \frac{5}{3}$
$b) - 8.1 \div 0.04 = - ( 8.1 \div 0.04) = - ( \frac{81}{10} \div \frac{4}{100} ) = - ( \frac{81}{10} \times \frac{100}{4}) = - ( \frac{81 \times 100}{10 \times 4}) = - ( \frac{8100}{40}) = - \frac{8100}{40} = -8100 \div 40 = \boxed {202.5}$
$c) - 1.5 = - \frac{15}{10} = - \frac{15 \div 5}{10 \div 5} = \boxed{ - \frac{3}{2} }$
$d) - 8.2 = - \frac{82}{10} = - \frac{82 \div 2}{10 \div 2} = \boxed{ - \frac{41}{5} }$
$e) - 20 \div - 1.6 = - \frac{20}{1} \div - \frac{10}{6} = - \frac{20}{1} \times - \frac{6}{10} = \frac{20 \times 6}{1 \times 10} = \frac{120}{10} = 120 \div 10 = \boxed{12}$