\(\dfrac{3}{18}=\dfrac{1}{6}\)
D
\(\dfrac{-5}{7}+\dfrac{4}{3}=\dfrac{13}{21}\)
\(-\dfrac{5}{7}:\dfrac{1}{2}=\dfrac{-10}{7}\)
1 tấn = 1000000 g
\(\dfrac{2}{3}h=40'\)