a) 6:04 − 2:51 =
[R]

b) 9:25 − 5:30 =
[R]

c) 3:13 − 1:45 =
[R]

d) 9:26 − 6:12 =
[R]

e) 8:09 − 6:50 =
[R]

f) 7:19 − 5:04 =
[R]

g) 5:01 − 1:10 =
[R]

h) 9:48 − 8:04 =
[R]

i) 8:30 − 6:06 =
[R]

j) 4:04 − 3:00 =
[R]