addition with carrying for grade 2

8:31

7:32

3:56

8:19

18:35

5:30

12:52

2:30

40:47

1:10

10:10

6:26

12:44

5:49

5:41

3:20

6:29

12:02

9:11

4:04

8:08

9:16

3:41

11:33

15:37

7:59

3:38

5:51

6:33

2:42

4:35

6:45

8:51

3:04

7:21

1:37

11:20

9:54

3:15

16:44

2:54

4:34

4:41

13:01

5:40

18:41

2:24

3:49

3:45

9:51

8:19

1:19

5:39

7:39

3:23

3:57

15:06

5:55

1:15

2:59