\(\dfrac{9}{7}-\dfrac{5}{11}x\dfrac{11}{7}=\dfrac{9}{7}-\dfrac{5}{7}=\dfrac{4}{7}\)

\(\dfrac{3}{7}+\dfrac{2}{5}+\dfrac{3}{4}=\dfrac{60}{140}+\dfrac{56}{140}+\dfrac{105}{140}=\dfrac{221}{140}\)

\(a,5x\dfrac{7}{3}=\dfrac{5}{1}x\dfrac{7}{3}=\dfrac{35}{3};b,\dfrac{13}{4}:7=\dfrac{13}{4} :\dfrac{7}{1}=\dfrac{13}{4}x\dfrac{1}{7}=\dfrac{13}{28}\)

\(\dfrac{30}{54}=\dfrac{5}{9}\)

\(\dfrac{5}{7}x\dfrac{3}{4}=\dfrac{15}{28}\)

\(\dfrac{5}{9}:\dfrac{3}{4}=\dfrac{5}{9}x\dfrac{4}{3}=\dfrac{20}{27}\)

60000

Hàng chục nghìn.

101

\(\dfrac{9}{10}\)