SGK Cánh Diều - Tập 2 - Trang 87
21 tháng 7 lúc 21:07
Tính:
\(\dfrac{1}{3}+\dfrac{1}{6}\) \(\dfrac{3}{4}-\dfrac{1}{8}\) \(\dfrac{1}{4}+\dfrac{1}{3}\) \(\dfrac{5}{6}-\dfrac{2}{5}\)
\(\dfrac{2}{5}\times\dfrac{3}{6}\) \(\dfrac{40}{7}\times\dfrac{14}{5}\) \(\dfrac{5}{8}:\dfrac{1}{2}\) \(\dfrac{6}{25}:\dfrac{21}{20}\)
\(8+\dfrac{2}{7}\) \(\dfrac{8}{5}-1\) \(9\times\dfrac{4}{7}\) \(\dfrac{5}{9}:3\)
