a) 7:22 − 5:24 =
[R]

b) 4:05 − 1:52 =
[R]

c) 12:03 − 10:00 =
[R]

d) 12:08 − 9:25 =
[R]

e) 3:06 − 1:50 =
[R]

f) 11:47 − 8:08 =
[R]

g) 10:15 − 8:06 =
[R]

h) 12:26 − 10:23 =
[R]

i) 4:38 − 2:19 =
[R]

j) 6:06 − 4:19 =
[R]