a) 7:29 − 5:26 =
[R]

b) 7:21 − 4:18 =
[R]

c) 5:08 − 3:24 =
[R]

d) 8:32 − 6:12 =
[R]

e) 10:08 − 8:47 =
[R]

f) 9:32 − 8:06 =
[R]

g) 7:23 − 4:14 =
[R]

h) 9:41 − 7:09 =
[R]

i) 5:29 − 2:09 =
[R]

j) 2:37 − 1:05 =
[R]