a) 5:48 − 3:09 =
[R]

b) 4:30 − 1:17 =
[R]

c) 12:07 − 10:20 =
[R]

d) 12:03 − 8:32 =
[R]

e) 6:07 − 2:46 =
[R]

f) 6:19 − 3:34 =
[R]

g) 5:01 − 3:12 =
[R]

h) 5:20 − 4:16 =
[R]

i) 10:30 − 9:05 =
[R]

j) 7:24 − 3:32 =
[R]