a) 5:22 − 4:04 =
[R]

b) 11:08 − 8:20 =
[R]

c) 4:28 − 3:09 =
[R]

d) 11:18 − 9:23 =
[R]

e) 5:27 − 2:28 =
[R]

f) 11:14 − 7:23 =
[R]

g) 7:22 − 4:30 =
[R]

h) 6:25 − 4:22 =
[R]

i) 9:51 − 8:08 =
[R]

j) 12:05 − 11:01 =
[R]