Question

Encontre os valores das expressões abaixo:
5/7-2/3+6/21=
1/14+1/7+0,5-4/28=
2 1/3+(1 1/6-1=

Answer 1

$\frac{5}{7} - \frac{2}{3} + \frac{6}{21} = \\ \frac{15}{21} - \frac{14}{21} + \frac{6}{21} = \frac{7}{21} = 3$