a) 10:18 − 6:22 =
[R]

b) 4:25 − 1:02 =
[R]

c) 10:16 − 8:41 =
[R]

d) 10:28 − 9:06 =
[R]

e) 8:13 − 4:41 =
[R]

f) 5:19 − 2:11 =
[R]

g) 10:10 − 7:32 =
[R]

h) 8:19 − 5:08 =
[R]

i) 5:26 − 3:00 =
[R]

j) 7:01 − 4:23 =
[R]