Question

Calcule:

a) + 2/3 - 5/3 =

b) - 1/3 - 1/4 =

c) (- 3/7) . (+ 4/5) =

d) (- 3/5) : (- 2/7) =

Answer 1

Resposta:

Explicação passo a passo:

a) + $\frac{2}{3}$ - $\frac{5}{3}$ = $\frac{+2-5}{3}$ = $\frac{-3}{3}$ = -1

b) - $\frac{1}{3}$ - $\frac{1}{4}$ = $\frac{-4-3}{12}$ = $\frac{-7}{12}$

c)  (- $\frac{3}{7}$) .(+ $\frac{4}{5}$) = $\frac{-3.4}{7.5}$ = $\frac{(-12)}{35}$

d) (- $\frac{3}{5}$) :(- $\frac{2}{7}$) = (- $\frac{3}{5}$).(- $\frac{7}{2}$) = $\frac{(-3).(-7)}{5.2}$ = $\frac{+21}{10}$

Answer 2

Explicação passo-a-passo:

$a) \frac{2}{3} - \frac{5}{3} = \frac{2 - 5}{3} = \frac{ - 3}{3} = - 1$

$b) - \frac{1}{3} - \frac{1}{4} = \: \: mmc = 12$

$\frac{ - 4 - 3}{12} = \frac{ - 7}{12}$

$c)( - \frac{3}{7} ).( + \frac{4}{5} ) = \frac{ - 12}{35}$

$d)( - \frac{3}{5} ) \div ( - \frac{2}{7} ) = - \frac{3}{5} . - \frac{7}{2} = \frac{21}{10}$