314x31.4+628x68.6+68.6x686有没有简算方法？

314x31.4+628x68.6+68.6x686有没有简算方法？ 用简便方法计算.6.5X68十6.5X31十6.5.0.27X0.12十0.88X0.27. 0.58X68.6=?(得数保留整数,要竖式) 求文档:利用分解因式法计算13.1x3.14 314x0.715 1.54x31.4 max=1000*(x11+x12+x13)+700*(x21+x22+x23)+600*(x31+x32+x33);(8*x11+6*x21+5*x31)=2/3(1-0.15)*(8*x12+6*x22+5*x32);(8*x13+6*x23+5*x33)=1/2(1-0.15)*(8*x12+6*x22+5*x32);(8*x11+6*x21+5*x31)=4/3(1-0.10)*(8*x13+6*x23+5*x33);8*x11+6*x21+5*x31 9宫数独 .XX5 X68 XX228X XXX X6XXXX 9XX 3X5XXX XX1 74X8XX X5X XX6X46 7XX XXX7X1 XX6 XXXX5X XXX X34 4XX 83X 6XX lingo 出现1017min = 6*x11+2*x12+6*x13+7*x14+4*x21+9*x22+5*x23+3*x24+8*x31+8*x32+x33+5*x34;x11+x12+x13+x14=30;x21+x22+x23+x24=25;x31+x32+x33+x34=21;x11+x21+x31=15;x12+x22+x32=17;x13+x23+x33=22;x14+x24+x34=12; 关于初一的因式分解,3Q1/4x25.3+0.25x78.6-3.9x1/4202²+202x196+98²184.5²+184.5x31+15.5² 成分：99%C 4% 规格60+150D/T*60 密度123X68 门幅55/56; 成分：99%C 4% 规格:60+150D/T*60 密度:123X68 门幅:55/56'' 求问lingo大神!model:max=3*x11+9*x12-7*x21-x22-x31+5*x32-6*x41;0.5*x11-1.5*x21-0.5*x31-1.5*x41 （怎样简便就怎样算）15x(3分之2+5分之3）17分之4X（25x68) 86x68的简便运算有木有谢谢 4.5x12.6-3.6x4.5+4.5简便计算还有45.6x6.7+4.56x31+0.456x20今天答完 求一道数学题(过程）简便方法3.6x31.4+43.9x6.420.05x39+200.5x4.1+40x10.05 求改lingo程序,用sets：endsetsmin=1020*2-(48.7*(x11+x12)+52.0*(x21+x22)+61.3*(x31+x32)+72.0*(x41+x42)+48.7*(x51+x52)+52.0*(x61+x62)+64.0*(x71+x72));2*x11+3*x21+x31+0.5*x41+4*x51+2*x61+x71=0;x72>=0;@gin(x11);@gin(x21);@gin(x31);@gin(x41);@gin(x51 面料：32/2x150D+40D/86X68 解方程； 3x-2X4=7怎么做2x+4x=4.2x31/9x+1/2=3/4 91x31-91= 乘法分配律