a) 8:34 − 6:10 =
[R]

b) 7:32 − 5:20 =
[R]

c) 8:22 − 4:27 =
[R]

d) 4:16 − 1:02 =
[R]

e) 9:24 − 7:16 =
[R]

f) 8:26 − 6:22 =
[R]

g) 10:37 − 7:11 =
[R]

h) 4:48 − 3:00 =
[R]

i) 12:21 − 10:00 =
[R]

j) 4:42 − 1:06 =
[R]