a) 5:31 − 3:05 =
[R]

b) 12:13 − 9:15 =
[R]

c) 9:42 − 7:07 =
[R]

d) 11:02 − 8:46 =
[R]

e) 5:48 − 2:11 =
[R]

f) 11:23 − 8:24 =
[R]

g) 9:11 − 6:13 =
[R]

h) 11:03 − 7:55 =
[R]

i) 3:31 − 1:13 =
[R]

j) 8:22 − 4:36 =
[R]