a) 5:14 − 2:04 =
[R]

b) 11:10 − 9:15 =
[R]

c) 5:17 − 2:42 =
[R]

d) 10:12 − 6:39 =
[R]

e) 6:20 − 4:26 =
[R]

f) 10:01 − 6:15 =
[R]

g) 11:06 − 7:46 =
[R]

h) 2:20 − 1:01 =
[R]

i) 5:03 − 2:30 =
[R]

j) 8:43 − 6:14 =
[R]