a) 8:02 − 6:00 =
[R]

b) 10:20 − 8:11 =
[R]

c) 8:06 − 5:06 =
[R]

d) 9:02 − 7:09 =
[R]

e) 11:22 − 7:27 =
[R]

f) 4:08 − 1:10 =
[R]

g) 5:03 − 2:32 =
[R]

h) 10:16 − 9:05 =
[R]

i) 2:16 − 1:15 =
[R]

j) 3:34 − 2:18 =
[R]