a) 12:02 − 10:19 =
[R]

b) 8:37 − 7:12 =
[R]

c) 6:02 − 3:37 =
[R]

d) 5:29 − 3:24 =
[R]

e) 7:01 − 4:31 =
[R]

f) 7:13 − 3:39 =
[R]

g) 7:19 − 6:11 =
[R]

h) 4:02 − 2:31 =
[R]

i) 5:18 − 3:06 =
[R]

j) 5:08 − 3:32 =
[R]