a) 9:53 − 8:03 =
[R]

b) 9:37 − 7:07 =
[R]

c) 6:18 − 5:06 =
[R]

d) 8:47 − 7:08 =
[R]

e) 9:00 − 5:47 =
[R]

f) 8:29 − 7:26 =
[R]

g) 7:35 − 6:08 =
[R]

h) 4:46 − 2:13 =
[R]

i) 3:12 − 1:37 =
[R]

j) 7:42 − 4:04 =
[R]