a) 3:02 − 2:01 =
[R]

b) 3:20 − 2:00 =
[R]

c) 7:05 − 5:52 =
[R]

d) 10:33 − 8:15 =
[R]

e) 5:00 − 3:13 =
[R]

f) 9:16 − 7:02 =
[R]

g) 11:25 − 7:33 =
[R]

h) 4:28 − 1:27 =
[R]

i) 12:18 − 9:16 =
[R]

j) 10:02 − 7:28 =
[R]