a) 5:06 − 1:26 =
[R]

b) 12:13 − 9:04 =
[R]

c) 9:12 − 7:28 =
[R]

d) 9:32 − 8:23 =
[R]

e) 7:16 − 3:42 =
[R]

f) 4:01 − 2:24 =
[R]

g) 10:06 − 8:37 =
[R]

h) 6:30 − 3:16 =
[R]

i) 6:12 − 2:41 =
[R]

j) 9:27 − 8:09 =
[R]