a) 6:06 − 4:18 =
[R]

b) 9:00 − 6:17 =
[R]

c) 11:48 − 10:11 =
[R]

d) 8:03 − 5:26 =
[R]

e) 8:34 − 5:15 =
[R]

f) 8:13 − 6:43 =
[R]

g) 3:47 − 2:12 =
[R]

h) 5:06 − 1:13 =
[R]

i) 8:11 − 5:03 =
[R]

j) 9:03 − 5:33 =
[R]