Question

SO SÁNH :

a) \(\dfrac{-18}{91}\)và \(\dfrac{-23}{114}\)

b)\(\dfrac{-22}{35}\)và\(\dfrac{-103}{177}\)

c)\(\dfrac{-22}{45}\)và\(\dfrac{-17}{33}\)

CẢM ƠN MN NHÌU (^_^)

Answer 1

a. \(\dfrac{-18}{91}\) và \(\dfrac{-23}{114}\) ( mẫu chung : 10374 )

Quy đồng : \(\dfrac{-18}{91}=\dfrac{-2052}{10374}\) ; \(\dfrac{-23}{114}=\dfrac{-2093}{10374}\)

Vì \(\dfrac{-2052}{10374}>\dfrac{-2093}{10374}\Rightarrow\dfrac{-18}{91}>\dfrac{-23}{114}\)

Vậy...

b. \(\dfrac{-22}{35}\) và \(\dfrac{-103}{177}\) ( MC = 6195 )

Quy đồng : \(\dfrac{-22}{35}=\dfrac{-3894}{6195};\dfrac{-103}{177}=\dfrac{-3605}{6195}\)

Vì \(\dfrac{-3894}{6195}< \dfrac{-3605}{6195}\Rightarrow\dfrac{-22}{35}< \dfrac{-103}{177}\)

Vậy...

c. \(\dfrac{-22}{45}\) và \(\dfrac{-17}{33}\)(MC=495)

Quy đồng : \(\dfrac{-22}{45}=\dfrac{-242}{495};\dfrac{-17}{33}=\dfrac{-255}{495}\)

Vì \(\dfrac{-242}{495}>\dfrac{-255}{495}\Rightarrow\dfrac{-22}{45}>\dfrac{-17}{33}\)

Vậy