a) 4:25 − 1:23 =
[R]

b) 9:05 − 7:04 =
[R]

c) 10:01 − 6:18 =
[R]

d) 7:05 − 5:27 =
[R]

e) 12:20 − 8:24 =
[R]

f) 11:10 − 7:46 =
[R]

g) 9:15 − 7:42 =
[R]

h) 9:07 − 7:21 =
[R]

i) 9:00 − 8:00 =
[R]

j) 11:08 − 7:41 =
[R]