additionsubtraction

12:54

7:06

17:53

8:32

1:44

6:12

12:17

4:07

9:50

13:14

21:42

19:15

8:39

1:38:22

45:36

1:16:14

1:02:48

11:08

8:46

15:21

4:43

5:44

39:32

10:17

8:59

8:12

59:22

4:19

5:35

2:28

2:14

4:06

3:04

6:10

2:01

3:18

12:32

4:23

2:41

2:56

10:04

4:03

6:34

5:11

8:49

3:18

3:48

3:17

8:26

3:20

2:27

2:29

2:47

3:30

7:33

2:24

4:53

7:57

11:34

1:33