a) 7:17 − 3:37 =
[R]

b) 11:28 − 9:02 =
[R]

c) 4:05 − 2:25 =
[R]

d) 3:12 − 1:37 =
[R]

e) 5:13 − 3:05 =
[R]

f) 12:08 − 8:14 =
[R]

g) 4:39 − 1:02 =
[R]

h) 12:12 − 8:41 =
[R]

i) 6:12 − 5:00 =
[R]

j) 7:03 − 3:36 =
[R]