a) 3:38 − 1:13 =
[R]

b) 6:12 − 2:31 =
[R]

c) 5:41 − 4:01 =
[R]

d) 9:49 − 7:09 =
[R]

e) 5:02 − 2:18 =
[R]

f) 10:42 − 7:15 =
[R]

g) 9:47 − 7:07 =
[R]

h) 11:38 − 8:01 =
[R]

i) 10:03 − 6:47 =
[R]

j) 6:16 − 5:05 =
[R]