a) 8:19 − 7:03 =
[R]

b) 4:32 − 2:16 =
[R]

c) 12:31 − 10:26 =
[R]

d) 4:09 − 3:06 =
[R]

e) 10:04 − 7:52 =
[R]

f) 6:10 − 3:43 =
[R]

g) 12:03 − 10:18 =
[R]

h) 4:08 − 1:34 =
[R]

i) 12:01 − 10:29 =
[R]

j) 8:16 − 5:22 =
[R]