a) 7:04 − 3:55 =
[R]

b) 11:18 − 7:27 =
[R]

c) 9:05 − 7:26 =
[R]

d) 6:40 − 4:02 =
[R]

e) 6:29 − 4:00 =
[R]

f) 9:16 − 8:09 =
[R]

g) 6:16 − 5:05 =
[R]

h) 10:53 − 8:02 =
[R]

i) 5:33 − 4:07 =
[R]

j) 5:17 − 1:33 =
[R]