a) 8:00 − 6:34 =
[R]

b) 11:40 − 9:02 =
[R]

c) 10:26 − 7:04 =
[R]

d) 12:24 − 10:03 =
[R]

e) 10:15 − 6:33 =
[R]

f) 10:35 − 7:13 =
[R]

g) 12:22 − 9:37 =
[R]

h) 8:08 − 5:45 =
[R]

i) 12:03 − 10:22 =
[R]

j) 9:23 − 6:33 =
[R]