how to learn abacus level 1

11:32

5:00

5:09

1:39

4:19

2:21

2:52

4:46

2:53

12:34

کوتاه

3:36

17:10

3:21

6:16

2:03

5:00

1:54:51

6:40

10:40

12:27

9:29

4:40

4:58

8:14

7:15

4:46

4:26

5:02

3:51

4:30

9:51

7:51

11:02

21:07

10:36

5:56

3:17

3:06