简便计算:(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23
4个回答
令A=0.23+0.34=0.57
原式=(1+A)*(A+0.65)-(1+A+0.65)*A
=A+A2+0.65A+0.65-A-A2-0.65A
=0.65
相关问题
(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)x(0.23+0.34+0.65)-(1+0.23+0.34+0.65)x(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.
(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)×(0.233+0.34+0.65)-(1+0.23+0.24+0.65)×(0.23+0.
(1+0.23+0.34)*(0.23+0.34+0.45)-(1+0.23+0.34+0.45)*(0.23+0.34
计算.要简便 (1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.
(1+0.23+0.34)×(0.23+0.34+0.45)-(1+0.23+0.34+0.45)×(0.23+0.34
(1+0.23+0.34)×(0.23+0.34+0.56)-(1+0.23+0.34+0.56)×(0.23+0.34
﹙1+0.23+0.34﹚×﹙0.23+0.34+0.56)-﹙1+0.23+0.34+0.56﹚×﹙0.23+0.34