Question

$\frac{2}{3} - \frac{1}{6}$
$\frac{4}{5} + \frac{3}{10}$
$\frac{ - 5}{ 6} \frac{ - 7}{4}$
$\frac{ - 3}{8} + \frac{1}{8} + \frac{5}{8}$
$\frac{5}{6} - \frac{1}{5}$
$\frac{ - 5}{9} - \frac{1}{15}$
$\frac{3}{4} - 3$
$5 - \frac{8}{3}$
​

Answer 1

Explicação passo-a-passo:

$\frac{2}{3} - \frac{1}{6} = \frac{(2 \times 2) - 1}{6} = \frac{4 - 1}{6} = \frac{3}{6} = \frac{1}{2} \\ \\ \frac{4}{5} + \frac{3}{10} = \frac{(2 \times 4) + 3}{10} = \frac{8 + 3}{10} = \frac{11}{10} \\ \\ \frac{ - 5}{6} - \frac{7}{4} = \frac{ - (2 \times 5) - (3 \times 7)}{12} = \frac{ - 10 - 21}{12} = - \frac{31}{10} \\ \\ \frac{ - 3}{8} + \frac{1}{8} + \frac{5}{8} = \frac{ - 3 + 6}{8} = \frac{3}{8} \\ \\ \frac{5}{6} - \frac{1}{5} = \frac{(5 \times 5) - (6 \times 1)}{6 \times 5} = \frac{25 - 6}{30} = \frac{19}{30} \\ \\ \frac{ - 5}{9} - \frac{1}{15} = \frac{ - (5 \times 5) - (3 \times 1)}{45} = \frac{ - 25 - 3}{45} = - \frac{28}{45} \\ \\ \frac{3}{4} - 3 = \frac{3 - (4 \times 3)}{4} = \frac{3 - 12}{4} = - \frac{9}{4} \\ \\ 5 - \frac{8}{3} = \frac{(3 \times 5) - 8}{3} = \frac{15 - 8}{3} = \frac{7}{3}$