0.648/[(0.4+0.5)*0.6] 简便

0.648/[(0.4+0.5)*0.6] 简便 2009全国1卷数学19题概率题怎么给分只写了P=0.6*0.6+0.4*0.6*0.6+0.6*0.4*0.6=0.648第一问可以拿满分吗? 6.48/[(0.5+0.4)*0.6] 要简便 0.4x-2.1/0.5-0.5-0.2x/0.03=0.6 (+0.2)+(-0.2)+(+0.7)+(-0.3)+(-0.4)+(+0.6)+0+(-0.1)+(-0.6)+(+0.5)+(-0.2)+(-0.5)=?(+0.2)+(-0.2)+(+0.7)+(-0.3)+(-0.4)+(+0.6)+0+(-0.1)+(-0.6)+(+0.5)+(-0.2)+(-0.5)=? 0.648÷0.12÷0.5简便运算脱式计算 巧算:0.1+0.2+0.3+0.4+0.5+0.6+0.7+0.8+0.9 0.1+0.3+0.5+0.7+..+2.9-0.2-0.4-0.6-...-2. 0.1-0.2+0.3-0.4+0.5-0.6+.+9.9-10+10.1巧算 (0.4+2.2×0.5﹚×0.6递等式计算 0.4和0.6之间只有一个一位小数0.5.对错 (0.2+0.4+0.6+...+9.8+10)-(+0.1+0.3+0.5+...+9.7+9.9) x/0.5-0.4x-0.6/0.2=2(-x+3) (0.4x-2.1)/0.5=(0.1+0.2x)/0.03-0.6 (0.4x-2.1)/0.5=(0.1+0.2x)/0.03-0.6 2.1,0.4,0.5,1.5,0.6,后面怎么填 0.5+3(1-0.2X)> 0.4X-0.6 数学建模的lingo软件怎么用LINGO软件编程：MIN=X1+X2+X3+X4+X5;X1*(2*0.6+0.4)>100000*0.2*0.5;x2*(2*0.6+0.4)>100000*0.1*0.5;x3*(2*0.6+0.4)>100000*0.05*0.5;x4*(2*0.6+0.4)>100000*0.025*0.5;x5*(2*0.6+0.4)>100000*0.01*0.5;endgin 5需要：从