addition with regrouping 3 digit numbers

11:20

9:11

3:19

5:51

7:09

2:40

2:42

2:20

10:15

3:04

2:00

00:38

2:46

2:31

2:26

4:35

4:12

11:57

4:44

6:29

12:44

5:49

2:51

11:24

00:41

3:56

3:41

2:16

1:45

5:12

5:36

30:27

2:57

6:26

9:54

1:29

5:17

4:40

2:54

3:38

3:12

14:17

5:40

7:38

2:47

2:39

8:43

13:21

2:18

8:17

2:26

2:57

3:48

4:15

6:23

15:37

9:11

9:19

14:10

3:14