a) 5:39 − 3:18 =
[R]

b) 11:20 − 8:33 =
[R]

c) 12:20 − 9:38 =
[R]

d) 9:06 − 6:17 =
[R]

e) 5:11 − 4:07 =
[R]

f) 4:16 − 1:06 =
[R]

g) 9:46 − 6:01 =
[R]

h) 6:17 − 4:07 =
[R]

i) 6:33 − 5:08 =
[R]

j) 12:11 − 10:09 =
[R]