a) 6:02 − 2:22 =
[R]

b) 8:20 − 4:30 =
[R]

c) 9:35 − 7:11 =
[R]

d) 12:19 − 8:39 =
[R]

e) 5:01 − 3:35 =
[R]

f) 10:15 − 7:30 =
[R]

g) 7:38 − 6:05 =
[R]

h) 8:03 − 6:00 =
[R]

i) 11:00 − 7:08 =
[R]

j) 5:24 − 4:19 =
[R]