Question

So sánh các phân số :

a) 17/200 và 17/314 

b) 11/54 và 22/37 

c) 141/893 và 159/901

d) 9/382; 6/257; 15/643

Answer 1

a: 200<314

=>1/200>1/314

=>17/200>17/314

b: 11/54=22/108

37<108

=>22/37>22/108

=>22/37>11/54

c: 141/893=3/19

159/901=3/17

mà 3/19<3/17

nên 141/893<159/901

d: 9/382=18/764=90/3820

6/257=18/771=90/3855

15/643=90/3858

3820<3855<3858

=>90/3820>90/3855>90/3858

=>9/382>6/257>15/643

Answer 2

a: 200<314

=>1/200>1/314

=>17/200>17/314

b: 11/54=22/108

37<108

=>22/37>22/108

=>22/37>11/54

c: 141/893=3/19

159/901=3/17

mà 3/19<3/17

nên 141/893<159/901

d: 9/382=18/764=90/3820

6/257=18/771=90/3855

15/643=90/3858

3820<3855<3858

=>90/3820>90/3855>90/3858

=>9/382>6/257>15/643