a) 9:24 − 7:01 =
[R]

b) 4:35 − 1:22 =
[R]

c) 9:01 − 7:48 =
[R]

d) 12:17 − 10:03 =
[R]

e) 11:12 − 9:08 =
[R]

f) 10:28 − 8:05 =
[R]

g) 3:32 − 2:11 =
[R]

h) 7:15 − 5:09 =
[R]

i) 9:35 − 7:06 =
[R]

j) 10:05 − 8:01 =
[R]