a) 9:15 − 6:04 =
[R]

b) 3:42 − 2:10 =
[R]

c) 5:11 − 1:41 =
[R]

d) 5:06 − 2:51 =
[R]

e) 11:06 − 8:02 =
[R]

f) 11:00 − 9:47 =
[R]

g) 11:00 − 8:42 =
[R]

h) 4:00 − 2:45 =
[R]

i) 9:16 − 6:32 =
[R]

j) 5:31 − 4:15 =
[R]