用特殊方法算(1+0.45+0.56)*(0.45+0.56+0.67)-(1+0.45+0.56+0.67*(0.45
1个回答
设0.45+0.56=A,0.45+0.56+0.67=B
则原式=(1+A)×(B)-(1+B)×(A)
=B+AB-A-AB=B-A
=0.67
相关问题
0.12+0.23+0.34+0.45+0.56+0.67+0.78+0.89=?
(1十0.23十0.45)x(0.45十o.67十0.89)一(1十0.45十0.67十0.89
0.45×32+0.45×67+0.45怎样简便计算
12:______=0.375=45÷______=______:56= () 16 .
6.3÷0.24 56.28÷0.67
(1).1,0,-1,(),-33(2).87,67,45,23,((3).3,-2,0,-3,-4,((4).0,-2
(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+0.45)-(1+0.23+0.34+0.45)×(0.23+0.34
45.6*6.7+4.56*31+0.456*20=?
0.45x0.55+0.45x0.45的简便法 急用