a) chuyen cac hon so sau thanh so thap phan :
\(3\frac{2}{5}=..............\); \(12\frac{3}{4}=..........\) ; \(6\frac{1}{2}=............\)
b) chuyen cac so thap phan sau thanh phan so thap phan :
1,245=................... ; 45,2=.................... ; 20,15=.............................
cac bn nho lam ca 2 phan ro rang nha