a) 5:08 − 3:38 =
[R]

b) 11:37 − 8:04 =
[R]

c) 6:28 − 5:28 =
[R]

d) 4:00 − 2:53 =
[R]

e) 12:00 − 8:11 =
[R]

f) 5:30 − 3:19 =
[R]

g) 9:29 − 6:08 =
[R]

h) 7:08 − 4:47 =
[R]

i) 11:25 − 9:33 =
[R]

j) 9:44 − 7:01 =
[R]