mental maths practice

7:11

31:03

3:07

12:31

21:42

5:42

10:44

8:00

00:32

11:07

16:11

30:57

16:23

16:10

13:10

9:39

10:50

9:23

5:02

13:33

18:35

14:43

3:30

16:40

17:18

2:54

11:41

38:16

6:58

7:56

5:25

9:00

3:11

7:06

8:02

3:18

5:10

5:35

3:49

11:50

11:33

7:04

6:39

3:12

15:21

12:46

6:54

3:39

14:05

16:00

10:44

3:34

4:20

20:43

10:52

7:48

1:24:43

6:02

12:44

9:10