(1+0.23+0.34)(0.23+0.34+0.65)-(1+0.23+0.34+0.65)(0.23+0.34)

来源：学生作业帮助网编辑：作业帮时间：2024/11/08 01:40:24

(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)

(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
设0.23+0.34=x
0.23+0.34+0.65=y
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)
=(1+x)y-(1+y)x
=y+xy-x-xy
=y-x
=0.65

不用楼上那么麻烦！
设A=0.23+0.34
原式
=(1+A)*(A+0.65)-(1+A+0.65)*(A)
=A²+A+0.65A+0.65-A²-A-0.65A
=0.65

设：1+0.23+0.34=a； 0.23+0.34=b；
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34）
=a×（b＋0.65）－（a＋0.65）×b
=ab＋0.65a－ab－0.65b
=0.65×（a－b）…………因为：a=1+0.23+0.34；b=0.23+0.34
=0.65×（1+0.23+0.34－0.23－0.34）
=0.65×1
=0.65

(1+0.23+0.34)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(0.23+0.(1+0.23+0.34)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(0.23+0. 简便计算：(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34) (1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34的简便算是多少简便计算(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34) (1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34的简便算是多少 (1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34) 巧算(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34) (1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34)) (1+0.23+0.34)*(0.23+0.34+0.45)-(1+0.23+0.34+0.45)*(0.23+0.34)简便运算 (1+0.23+0.34)x(0.23+0.34+0.78)-(1+0.23+0.34+0.78)x(0.23+0.34) （1+0.23+0.34）×（0.23+0.34+0.45）-（1+0.23+0.34+0.45）×（0.23+0.34）计算：（1+0.23+0.34）*（0.2903+0.34+0.56）-（1+0.23+0.34+0.56）*（0.23+0.34 简便计算(1+023+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34) 求解(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)=? 简便运算 (1+0.12+0.23)x(0.12+0.23+0.34)-(1+0.12+0.23+0.34)x(0.12+0.23) (1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)= （1+0.12+0.23）×（0.12+0.23+0.34）- （1+0.12+0.23+0.34）×（0.12+0.23）. (1+0.12+0.23)X(0.12+0.23+0.34)-(1+0.12+0.23+0.34)X(0.12+0.23)=?