Question

giúp iem với,trl+đúng=like

Answer 1

Bài 7:

a: 2/7=18/63; 4/9=28/63

b: 3/8=39/104; 6/13=48/104

c: 24/13=96/52; 57/52=57/52

d: 666/707=1332/1414

555/1414=555/1414