a) 7:05 − 5:15 =
[R]

b) 8:24 − 5:04 =
[R]

c) 12:04 − 9:11 =
[R]

d) 9:04 − 5:39 =
[R]

e) 3:12 − 1:43 =
[R]

f) 9:17 − 5:42 =
[R]

g) 11:17 − 10:05 =
[R]

h) 7:35 − 6:12 =
[R]

i) 11:42 − 9:05 =
[R]

j) 5:11 − 1:19 =
[R]