add subtract decimals

6:07

9:06

8:16

3:22

5:28

12:16

10:55

21:34

2:46

2:19

2:08

3:24

5:36

3:12

2:40

7:06

4:54

8:40

13:13

11:43

1:51

9:45

6:09

14:32

1:11

1:11:53

3:41

4:56

28:37

8:39

17:57

8:47

6:02

12:17

16:24

9:40

9:57

7:56

8:59

5:02

4:32

3:53

4:12

9:15

9:43

2:44

4:08

1:50

2:06

3:38

3:41

2:33

17:58

2:45

5:42

4:56

5:40

5:33

4:34

9:29