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3) 4 ¾ - 3 5/12
= (4 - 3)+ (9/12 - 5/12)
= 1 4/12
= 1 ⅓
4) 7 6/10 - 2 1/5
= (7 - 2) + (6/10 - 2/10)
= 5 4/10
= 5 2/5
5) (4 - 1) + (15/18 - 4/18)
= 3 11/18
6) 8 2/10 - 6/10
= 7 6/10
= 7 3/5
7) 3 8/20 - 15/20
= 2 13/20
8) 9 6/12 - 5 4/12
= 4 2/12
= 4 1/6
9) 8 3/10 - 4 6/8
= 8 12/40 - 4 30/40
= 7 22/40
= 7 11/20
10) 11 12/30 - 7 6/30
= 4 6/30
= 4 1/5