a) 6:12 − 4:45 =
[R]

b) 5:15 − 1:40 =
[R]

c) 6:34 − 5:20 =
[R]

d) 9:21 − 8:20 =
[R]

e) 8:20 − 7:18 =
[R]

f) 6:21 − 3:10 =
[R]

g) 6:25 − 4:20 =
[R]

h) 7:10 − 4:49 =
[R]

i) 8:06 − 6:50 =
[R]

j) 12:05 − 8:11 =
[R]