10/13÷2又19/22-1又2/5*11/13÷7+1/5*22/63=
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/09 03:46:27
10/13÷2又19/22-1又2/5*11/13÷7+1/5*22/63=
10/13÷2又19/22-1又2/5*11/13÷7+1/5*22/63=
10/13÷2又19/22-1又2/5*11/13÷7+1/5*22/63=
10/13÷2又19/22-1又2/5*11/13÷7+1/5*22/63
=10/13÷63/22-11/(5*13)+22/(5*63)
=220/(13*63)-11/(5*13)+22/(5*63)
=(220*5-11*63+22*13)/(5*13*63)
=-11/65
原式=10/13×22/63-7/5×11/13×1/7﹢1/5×22/63
=22/63﹙10/13﹢1/5﹚-77/455
=22/65-77/455
=2/91
我怎么等于这个-_-|||