Bài 3

2) 0,(3)=0.333

3) 0,(7)=0.780

4) 0.(6)=0.670

5)0.0(5)=0.060

6)0.(12)=0.121

7)0.(41)=0.414

8)0.(61)=0.620

9)0.0(23)=0.023

10)0.0(81)=0.081

11) 0.(313)=0.313

Bài 4

12) 0.(123)=0.1231

13)0.(456)=0.4564

14)0.0(321)=0.0321

15)0.0(789)=0.0790

16)1.(2)=1.2222

17)1.(34)=1.3434

18)5.0(6)=5.0670

19)8.2(7)=8.2780

20)6.(05)=6.0510

21)1.0(03)=1.0030

Bài 4

12) 0.(123)=0.1231

13)0.(456)=0.4564

14)0.0(321)=0.0321

15)0.0(789)=0.0790

16)1.(2)=1.2222

17)1.(34)=1.3434

18)5.0(6)=5.0670

19)8.2(7)=8.2780

20)6.(05)=6.0510

21)1.0(03)=1.0030

Vote cho tui 5 sao nha!