Question

Efetue as operações a seguir, simplificando o resultado quando possível:

Answer 1

Resposta:

$a) \: \frac{3}{4} - \frac{1}{2} + \frac{2}{5} - \frac{1}{10} \\ \\ \frac{15 - 10 + 8 - 2}{20} \\ \\ \frac{11}{20}$

$b) \: \frac{8}{3} + \frac{1}{2} + 1 - \frac{1}{6} \\ \\ \frac{16 + 3 + 6 - 1}{6} \\ \\ \frac{24}{6} \\ \\ = 4$

$c) \: ( \frac{7}{8} - \frac{3}{4} ) + \frac{1}{4} \\ \\ \frac{1}{8} + \frac{1}{4} \\ \\ \frac{1 + 2}{8} \\ \\ = \frac{3}{8}$

$d) \: 2 \frac{1}{2} + ( \frac{1}{2} - \frac{1}{5} ) - ( \frac{7}{4} - \frac{5}{4} ) \\ \\ \frac{5}{2} + \frac{3}{10} - \frac{1}{2} \\ \\ \frac{25 + 3 - 5}{10} \\ \\ = \frac{23}{10}$