a) 7:23 − 4:08 =
[R]

b) 5:52 − 2:07 =
[R]

c) 11:33 − 9:12 =
[R]

d) 4:40 − 2:16 =
[R]

e) 5:02 − 2:02 =
[R]

f) 11:37 − 9:09 =
[R]

g) 7:10 − 4:37 =
[R]

h) 5:23 − 2:22 =
[R]

i) 11:29 − 9:09 =
[R]

j) 5:11 − 3:46 =
[R]