3又六分之一+﹙-1又十二分之一﹚
=2+6分之1-12分之1
=2又12分之1
-3.75+﹙-2又八分之三﹚
=-5-(4分之3+8分之3)
=-5-8分之9
=-6又8分之1
5又五分之二+﹙-7.6﹚
=5.4-7.6
=-2.2
1. 3+1/6-1-1/12
=3-1+2/12-1/12
=2+1/12
=2又12分之1
2. -3-3/4-2-3/8
=-3-2-6/8-3/8
=-5-9/8
=-6-1/8
=-6又8分之1
3. 5+2/5-7-3/5
=5-7+2/5-3/5
=-2-1/5
=-2又5分之1