Tính nhanh nếu có thể

\(\left[\left(\dfrac{1}{9}:\dfrac{8}{27}\right):\dfrac{-1}{3}\right]:\dfrac{81}{28}\)

\(\left(\dfrac{-7}{15}\right).\dfrac{5}{8}.\dfrac{15}{-7}.\left(-32\right)\)

\(0,5+\dfrac{1}{3}+0,4+\dfrac{5}{7}+\dfrac{1}{6}-\dfrac{4}{35}\)

Tính nhanh nếu có thể

\(\left(\dfrac{-3}{11}:\dfrac{5}{22}\right).\left(\dfrac{-15}{3}:\dfrac{26}{3}\right)\)

\(\dfrac{5}{12}.\left(\dfrac{-3}{4}\right)+\dfrac{7}{12}.\left(\dfrac{-3}{4}\right)\)

\(\dfrac{1}{7}.\dfrac{-3}{8}+\dfrac{1}{7}.\dfrac{-13}{8}\)

\(\dfrac{3}{5}.\dfrac{13}{46}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(\dfrac{2}{3}-4.\left(\dfrac{1}{2}+\dfrac{3}{4}\right)\)

\(\left(-\dfrac{1}{3}+\dfrac{5}{6}\right).11-7\)

Tính nhanh nếu có thể

1, \(\dfrac{1}{2}-\dfrac{43}{101}+\left(\dfrac{-1}{3}\right)-\dfrac{1}{6}\)

Tính

9/7 : (-3)

-12/21 : 34/43

I .................. about three DVDs a week. (watch)

.............. about three DVDs a week. (watch)