a) 9:15 − 5:20 =
[R]

b) 10:09 − 8:01 =
[R]

c) 12:22 − 9:30 =
[R]

d) 6:11 − 4:40 =
[R]

e) 5:24 − 4:01 =
[R]

f) 4:03 − 2:00 =
[R]

g) 12:07 − 11:02 =
[R]

h) 3:09 − 1:12 =
[R]

i) 9:22 − 8:14 =
[R]

j) 10:19 − 8:07 =
[R]