a) 7:10 − 4:49 =
[R]

b) 8:04 − 4:30 =
[R]

c) 12:34 − 9:00 =
[R]

d) 9:04 − 6:15 =
[R]

e) 12:08 − 10:33 =
[R]

f) 12:38 − 10:08 =
[R]

g) 6:15 − 2:41 =
[R]

h) 5:03 − 2:56 =
[R]

i) 11:36 − 8:01 =
[R]

j) 6:20 − 4:20 =
[R]