a) 4:17 − 3:11 =
[R]

b) 5:11 − 1:15 =
[R]

c) 7:09 − 6:05 =
[R]

d) 3:06 − 1:20 =
[R]

e) 8:14 − 7:10 =
[R]

f) 8:20 − 6:04 =
[R]

g) 6:51 − 3:06 =
[R]

h) 6:14 − 3:06 =
[R]

i) 8:08 − 5:45 =
[R]

j) 7:26 − 4:20 =
[R]