a) 8:27 − 5:25 =
[R]

b) 6:30 − 4:10 =
[R]

c) 9:24 − 6:02 =
[R]

d) 10:30 − 9:03 =
[R]

e) 9:16 − 7:17 =
[R]

f) 9:01 − 7:47 =
[R]

g) 5:13 − 2:46 =
[R]

h) 10:02 − 8:17 =
[R]

i) 3:30 − 2:25 =
[R]

j) 5:06 − 2:43 =
[R]