fast mental multiplication trick

10:50

6:10

3:37

3:37

13:57

5:13

7:06

12:30

2:40

11:05

4:33

4:33

3:24

3:24

3:23

3:23

6:44

11:55

کوتاه

26:08

9:50

5:16

8:39

12:39

11:28

22:00

8:38

22:32

13:39

6:54

6:54

2:19

47:44

2:08

12:49

15:06

10:59

52:23

2:58

3:04