Question

sắp sếp theo thứ tự 

 a)38/45 ; 7/12; 17/20 ;13/ 18

b) -7/12; -5/12; -3/5

 

Answer 1

a) \(\dfrac{38}{45}=\dfrac{152}{180}\); \(\dfrac{7}{12}=\dfrac{105}{180}\); \(\dfrac{17}{20}=\dfrac{153}{180}\); \(\dfrac{13}{18}=\dfrac{130}{180}\)

Sắp xếp theo thứ tự tăng dần : \(\dfrac{7}{12}-\dfrac{13}{18}-\dfrac{38}{45}-\dfrac{17}{20}\)

b) \(-\dfrac{7}{12}=-\dfrac{35}{60};-\dfrac{5}{12}=-\dfrac{25}{60};-\dfrac{3}{5}=-\dfrac{36}{60}\)

Sắp xếp theo thứ tự tăng dần : \(-\dfrac{3}{5};-\dfrac{7}{12};-\dfrac{5}{12}\)

Answer 2

a: \(\dfrac{7}{12}< \dfrac{13}{18}< \dfrac{38}{45}< \dfrac{17}{20}\)

b: \(-\dfrac{3}{5}< -\dfrac{7}{12}< -\dfrac{5}{12}\)