a) 6:15 − 4:40 =
[R]

b) 12:50 − 9:08 =
[R]

c) 5:46 − 2:02 =
[R]

d) 12:28 − 10:01 =
[R]

e) 6:10 − 4:18 =
[R]

f) 8:40 − 5:11 =
[R]

g) 7:31 − 5:00 =
[R]

h) 10:18 − 6:32 =
[R]

i) 8:17 − 6:12 =
[R]

j) 6:21 − 3:00 =
[R]