a) 9:38 − 8:08 =
[R]

b) 9:52 − 7:06 =
[R]

c) 8:50 − 7:00 =
[R]

d) 6:39 − 4:10 =
[R]

e) 10:02 − 7:48 =
[R]

f) 9:02 − 7:08 =
[R]

g) 10:01 − 7:11 =
[R]

h) 8:29 − 7:09 =
[R]

i) 7:26 − 6:05 =
[R]

j) 10:20 − 6:35 =
[R]