a) 10:01 − 7:06 =
[R]

b) 9:23 − 7:22 =
[R]

c) 6:20 − 3:30 =
[R]

d) 10:12 − 9:06 =
[R]

e) 7:14 − 4:32 =
[R]

f) 12:19 − 9:19 =
[R]

g) 11:37 − 8:10 =
[R]

h) 7:30 − 5:00 =
[R]

i) 4:34 − 2:25 =
[R]

j) 7:05 − 4:36 =
[R]