A=\(\dfrac{5}{13}\). \(\dfrac{5}{7}\)+ \(\dfrac{-20}{41}\)+ \(\dfrac{8}{13}\)+ \(\dfrac{-21}{41}\)
B= \(\dfrac{5}{7}\). \(\dfrac{2}{11}\)+ \(\dfrac{5}{7}\). \(\dfrac{12}{11}\)- \(\dfrac{5}{7}\). \(\dfrac{7}{11}\)
C=\(\dfrac{-2}{3}\)+ \(\dfrac{-5}{7}\)+ \(\dfrac{2}{3}\)+ \(\dfrac{-2}{7}\)
Loga
Toán lớp 6
