(﹣5/8)+(﹢4 又1/12)+[(﹣5/6)+(﹢2又5/8)+(1+1又11/12)]
=-5/8+4+1/12-5/6+2+5/8+2+11/12
=4+2+2+(1/12+11/12)+(5/8-5/8)-5/6
=8+1+0-5/6
=8又1/6
(﹣5/8)+(﹢4 又1/12)+[(﹣5/6)+(﹢2又5/8)+(1+1又11/12)]
=-5/8+4+1/12-5/6+2+5/8+2+11/12
=4+2+2+(1/12+11/12)+(5/8-5/8)-5/6
=8+1+0-5/6
=8又1/6