Question

không quy đồng mẫu số hay tử số hãy so sánh:

a)\(\dfrac{4}{9}\);\(\dfrac{1}{2}\)                                                   c)\(\dfrac{-5}{8}\);\(\dfrac{17}{-18}\)

b)\(\dfrac{5}{8}\);\(\dfrac{7}{12}\)                                                 d)\(\dfrac{8}{-15}\);\(\dfrac{-2}{3}\)

helppp me!!!

Answer 1

a) \(\dfrac{4}{9}< \dfrac{4}{8}=\dfrac{1}{2}\)

b) \(\dfrac{5}{8}=\dfrac{15}{24}>\dfrac{14}{24}=\dfrac{7}{12}\)

 

Answer 2

a)
4/9 < 5/10 mà 5/10 =1/2
=> 4/9<1/2
 

Answer 3

a: \(\dfrac{4}{9}< \dfrac{1}{2}\)

b: \(\dfrac{5}{8}>\dfrac{7}{12}\)

c: \(-\dfrac{5}{8}>-\dfrac{17}{18}\)

d: \(-\dfrac{8}{15}>-\dfrac{2}{3}\)