Do Huy Hiep
Giới thiệu về bản thân
Chào mừng bạn đến với trang cá nhân của Do Huy Hiep
0
0
0
0
0
0
0
2023-08-20 17:38:09
a) \(\dfrac{2}{3}.\dfrac{5}{4}-\dfrac{3}{4}.\dfrac{2}{3}=\dfrac{5}{6}-\dfrac{3}{6}=\dfrac{2}{6}=\dfrac{1}{3}\)
b)\(2.\left(\dfrac{-3^2}{2}\right)-\dfrac{7}{2}=2.\left(\dfrac{-6}{4}\right)-\dfrac{7}{2}=-3-\dfrac{7}{2}=\dfrac{-13}{2}\)
c)\(\dfrac{-3}{4}.5\dfrac{3}{13}-0,75.\dfrac{36}{13}=\dfrac{-3}{4}.\dfrac{68}{13}-\dfrac{3}{4}.\dfrac{36}{13}=\dfrac{-51}{13}-\dfrac{27}{13}=\dfrac{-78}{13}\)