(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)=简便方法
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(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)=简便方法
(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)=简便方法
(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)=简便方法
设0.12+0.23=a
∴(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.12+0.23)
=(1+a)(a+0.34)-(1+a+0.34)a
=a+0.34+a²+0.34a-a-a²-0.34a
=0.34
(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+0.34)X(0.12+0.23)
奥数简便运算(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)=简便方法
小数的简便运算:(1+0.12+0.23)×(0.12+0.23+0.34)—(1+0.12+0.23+0.34)×(0.12+0.23)
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)X(0.12+0.23+0.34)-(1+0.12+0.23+0.34)X(0.12+0.23)=?
(1+0.12+0.23)乘(0.12+0.23+0.34)_(1+0.12+0.23+0.34)乘(0.12+0.23)
好几个简便计算1.25×0.25×3232×9.1((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)×(0.12+0.23+0.34)—(1+0.12+0.23+0.34)×(0.12+0.23) 用字母方法
求(1+0.12+0.23)×(0.12+0.23+0.34)-(1+0.12+0.23+0.34)×(0.12+0.23)的简便方法是简便
14.5*(0.12+0.23+0.34)-(0.12+0.23+0.34+1)*4.5的简算
(1+0.12+0.23)x(0.12+0.23+0.34)-(1+0.12+0.23+0.34)x(0.12+0.23)等于几?用简便方法计算!
两道小学数学递等式!速度!7.5×2.3+1.9×2.5+22.5×0.4(1+0.12+0.23)×(0.12+0.23+0.34)—(1+0.12+0.23+0.34)×(0.12+0.23)小学5年级没学过.我要巧算,谢谢
﹝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﹞