a) 9:30 − 6:23 =
[R]

b) 12:08 − 9:51 =
[R]

c) 7:26 − 6:02 =
[R]

d) 4:24 − 1:30 =
[R]

e) 12:38 − 9:02 =
[R]

f) 5:01 − 2:54 =
[R]

g) 5:06 − 3:09 =
[R]

h) 8:03 − 4:09 =
[R]

i) 4:20 − 3:01 =
[R]

j) 11:06 − 7:33 =
[R]