a) 5:25 − 3:04 =
[R]

b) 8:07 − 7:04 =
[R]

c) 12:14 − 10:23 =
[R]

d) 10:04 − 7:41 =
[R]

e) 3:08 − 1:21 =
[R]

f) 9:22 − 6:35 =
[R]

g) 5:02 − 3:40 =
[R]

h) 6:28 − 4:00 =
[R]

i) 4:09 − 1:35 =
[R]

j) 11:12 − 9:18 =
[R]