a) 7:06 − 3:45 =
[R]

b) 10:03 − 8:39 =
[R]

c) 7:21 − 5:14 =
[R]

d) 6:21 − 4:15 =
[R]

e) 5:15 − 2:11 =
[R]

f) 8:02 − 4:46 =
[R]

g) 5:42 − 2:14 =
[R]

h) 12:34 − 10:17 =
[R]

i) 11:15 − 8:34 =
[R]

j) 9:15 − 8:10 =
[R]