a) 4:06 − 2:17 =
[R]

b) 7:47 − 4:11 =
[R]

c) 8:14 − 5:01 =
[R]

d) 8:02 − 5:50 =
[R]

e) 8:30 − 7:00 =
[R]

f) 12:33 − 9:25 =
[R]

g) 12:23 − 10:12 =
[R]

h) 8:30 − 5:04 =
[R]

i) 7:35 − 6:10 =
[R]

j) 5:09 − 3:12 =
[R]