Question

Calcular o valor das expressões numéricas, lembrando a ordem das operações:
a) 2/3 × 3/7 + 1/14
b) (1/3) - ( 1/3) + (1/3)=

Answer 1

$a) \\ \frac{2}{3} \times \frac{3}{7} + \frac{1}{14} = \\ \\ \frac{2}{\not3} \times \frac{\not3}{7} + \frac{1}{14} = \\ \\ \frac{2}{7} + \frac{1}{14} = \\ \\ \frac{4+1}{14} = \frac{5}{14} \\ \\ \\ b) \\ ( \frac{1}{3} )-( \frac{1}{3} )+( \frac{1}{3} )= \frac{1}{3} \\ \\ cancela~~ \frac{1}{3} - \frac{1}{3} =0$