a) 7:06 − 4:42 =
[R]

b) 11:20 − 9:07 =
[R]

c) 4:33 − 3:19 =
[R]

d) 5:08 − 2:00 =
[R]

e) 3:36 − 1:03 =
[R]

f) 5:20 − 2:00 =
[R]

g) 6:57 − 4:01 =
[R]

h) 6:05 − 2:27 =
[R]

i) 7:45 − 5:04 =
[R]

j) 11:15 − 9:02 =
[R]