2/3 + 5/9 - 3/4 = 17/36
2/7 : 2/3 - 1/7 = 2/7
2/5 x 1/4 : 3/8 = 4/15
tk mình nhé, mình mới đăng ký hồi lúc nãy
2/3+5/9-3/4=17/36
2/7:2/3-1/7=2/7
2/5*1/4:3/8=4/15
\(\frac{2}{3}+\frac{5}{9}-\frac{3}{4}\)=\(\frac{17}{36}\) \(\frac{2}{7}:\frac{2}{3}-\frac{1}{7}=\frac{2}{7}\) \(\frac{2}{5}\cdot\frac{1}{4}:\frac{3}{8}=\frac{4}{15}\)