(1+0.34+0.45+0.56)*(0.34+0.45+0.56+0.67)-(1+0.34+0.56+0.45+0.67)*(0.34+0.45+0.56)时间只有1个小时了,求求啊.

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(1+0.34+0.45+0.56)*(0.34+0.45+0.56+0.67)-(1+0.34+0.56+0.45+0.67)*(0.34+0.45+0.56)时间只有1个小时了,求求啊.
(1+0.34+0.45+0.56)*(0.34+0.45+0.56+0.67)-(1+0.34+0.56+0.45+0.67)*(0.34+0.45+0.56)
时间只有1个小时了,求求啊.

(1+0.34+0.45+0.56)*(0.34+0.45+0.56+0.67)-(1+0.34+0.56+0.45+0.67)*(0.34+0.45+0.56)时间只有1个小时了,求求啊.
令a=0.34+0.45+0.56
原式=(1+a)(a+0.67)-(1+a+0.67)a
=(1+a)a+0.67(1+a)-(1+a)a-0.67a
=0.67(1+a)-0.67a
=0.67+0.67a-0.67a
=0.67

(1+0.34+0.45+0.56)*(0.34+0.45+0.56+0.67)-(1+0.34+0.56+0.45+0.67)*(0.34+0.45+0.56)时间只有1个小时了,求求啊. 计算:(1+0.23+0.34)*(0.2903+0.34+0.56)-(1+0.23+0.34+0.56)*(0.23+0.34 0.12+0.23+0.34+0.45+0.56+0.67+0.78+0.89=? (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)×(0.23+0.34+0.45)-(1+0.23+0.34+0.45)×(0.23+0.34) 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+0.56)=? ﹙1+0.23+0.34﹚×﹙0.23+0.34+0.56)-﹙1+0.23+0.34+0.56﹚×﹙0.23+0.34) (1+0.12+0.34)*(0.12+0.34+0.56)-(1+0.12+0.34+0.56)*(0.12+0.34)用简便算法怎么算急! (1+0.12+0.34)x(0.12+0.34+0.56)-(1+0.12+0.34+0.56)x(0.12+0.34)要简便计算 (1+0.23+0.34)*(0.23+034+0.56)-(1+0.23+0.34+0.56)*(0.23+0.34) 简便算法 (1+0.23+0.34)*(0.23+034+0.56)-(1+0.23+0.34+0.56)*(0.23+0.34) 简便算法 0.12+0.23+0.34+0.45+0.56+0.67+0.78注意是循环小数,循环节在第二位 0.12+0.23+0.34+0.45+0.56答案是几 注:都是循环小数,第二位开始 0.12+0.23+0.34+0.45+0.56+0.67+0.78注意是循环小数,循环节在第二位 《2》 求(1+0.12+0.34)乘(0.12=0.34=0.56)-(1=0.12=0.34=0.56)乘(0.12+0.34)的 0.12+0.23+0.34+0.45+0.56+0.67+0.78+0.89,这是循环小数,循环最后一位,看得懂的来.........0.12+0.23+0.34+0.45+0.56+0.67+0.78+0.89,这是循环小数,看得懂的来,最后一位循环. 0.12+0.23+0.34+0.45+0.56+0.67+0.78+0.89,这是循环小数,最后一位循环.看得懂的来. 0.12+0.23+0.34+0.45+0.56+0.67+0.78+0.89,这是循环小数,最后一位循环.看得懂的来.