12+1又4/3-8又12/5-6.

来源：学生作业帮助网编辑：作业帮时间：2024/05/04 22:34:59

12+1又4/3-8又12/5-6.
12+1又4/3-8又12/5-6.

12+1又4/3-8又12/5-6.
12+1又4/3-8又12/5-6.75
=12+7/3-10.4-6.75
=12-10.4-6.75+7/3
=-5.15+7/3
=-103/20+7/3
=-169/60
=-2又49/60

12+1又4/3-8又12/5-6.75
=14+1/3-10-2/5-6.75
=1/3-3.15
=-2又49/60

12+1又4/3-8又12/5-6.75
=12+1.75-8又12/5-6.75
=7-8又12/5
=-1又12/5