a) 6:00 − 2:48 =
[R]

b) 8:02 − 5:27 =
[R]

c) 6:18 − 4:40 =
[R]

d) 8:20 − 7:10 =
[R]

e) 11:14 − 9:05 =
[R]

f) 9:10 − 6:23 =
[R]

g) 11:01 − 9:04 =
[R]

h) 12:59 − 10:00 =
[R]

i) 11:11 − 9:32 =
[R]

j) 9:10 − 5:43 =
[R]