Question

1)Resolva as operações com números racionais.
a)3/4 + 1/6=

b)-4/9 - 10/6=

c)-12/15 + 5/12 =​

Answer 1

Resposta:

$a) \: \frac{3}{4} + \frac{1}{6} \\ \\ \frac{9 + 2}{12} \\ \\ = \frac{11}{12}$

$b) \: - \frac{4 }{9} - \frac{10}{6} \\ \\ - \frac{8 - 30}{18} \\ \\ - \frac{ - 22 \div (2)}{18 \div (2)} \\ \\ - \frac{ - 11}{9} \\ \\ - ( - \frac{11}{9} ) \\ \\ = \frac{11}{9}$

$c) \: - \frac{12}{15} + \frac{5}{12} \\ \\ - \frac{12 \div (3)}{15 \div (3)} + \frac{5}{12} \\ \\ - \frac{4}{5} + \frac{5}{12} \\ \\ \frac{ - 48 + 25}{60} \\ \\ \frac{ - 23}{60} \\ \\ = - \frac{23}{60}$