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1) 3 - 8/9
= 2 (9/9 - 8/9)
= 2 1/9

2) 6 - 7/11
= 5 ( 11/11 - 7/11 )
= 5 4/11

3) 4 3/4 - 3 5/12
= (4-3) ( 3/4 - 5/12)
= 1 ( 9/12 - 5/12 )
= 1 4/12
= 1 1/3

4) 7 6/10 - 2 1/5
= (7-2) (6/10 - 1/5)
= 5 ( 6/10 - 2/10)
= 5 4/10
= 5 2/5

5) 4 5/6 - 1 2/9
= (4-1) (5/6-2/9)
= 3 ( 15/18 - 4/18)

6) 3 2/5 - 3/14
= 3 (2/5-3/14)
= 3 ( 28/70 - 15/70)
= 3 13/70
= 3 11/18

7) 8 1/5 - 6/10
= 8 ( 2/10 - 6/10)
= 7 ( 10/10 - 2/10 - 6/10)
= 7 2/10
= 7 1/5

8) 9 2/4 - 5 2/6
= (9-5) (2/4-2/6)
= 4 (6/12 - 4/12)
= 4 2/12
= 4 1/6

9) 8 3/10 - 4 6/8
= (8-4) (3/10 - 6/8)
= 4 ( 24/80 - 60/80)
= 2 ( 160/80 - 24/80 - 60/80)
= 2 76/80
= 2 19/20

10) 11 4/10 - 7 3/15
= (11-7) (4/10 - 3/15)
= 4 ( 12/30 - 6/30)
= 4 6/30
= 4 1/5