a) 4:19 − 1:22 =
[R]

b) 6:14 − 4:27 =
[R]

c) 7:33 − 4:06 =
[R]

d) 8:04 − 4:45 =
[R]

e) 6:16 − 5:09 =
[R]

f) 5:30 − 2:04 =
[R]

g) 9:11 − 6:48 =
[R]

h) 7:07 − 3:30 =
[R]

i) 8:07 − 7:00 =
[R]

j) 7:19 − 4:37 =
[R]