9 class math unit 7 exercise 71

36:44

23:44

35:26

31:16

20:50

16:50

16:25

31:38

15:04

21:40

2:45

3:58

14:33

13:57

16:08

5:37

17:20

4:20

4:31

14:21

7:08

1:21

12:51

3:25

7:39

16:00

54:48

4:55

2:12:05

11:38

3:16

19:23

9:00

1:04:15

44:01

4:06:28

1:07:42

5:25

3:28

24:04

10:48

5:39

36:56

3:48

1:56

6:13

13:29

1:37:29

19:36

4:32

5:37

6:12

14:11

6:10

11:09

12:28

8:58:17

3:40

3:53