Question

tinh

7 phan 12 - 2 phan 7 + 1 phan 12

12 phan 12 - 5 phan 17 - 4 phan 17

Answer 1

\(=\frac{8}{21}\)

\(=\frac{3}{17}\)

Answer 2

ban tinh tung cach cho minh di

 

Answer 3

\(\frac{7}{12}-\frac{2}{7}+\frac{1}{12}\)=\(\frac{25}{84}\)+\(\frac{1}{12}\)=\(\frac{8}{21}\)

\(\frac{12}{12}-\frac{5}{17}-\frac{4}{17}=\frac{12}{17}-\frac{4}{17}=\frac{8}{17}\)