199.199X198-198.198X199

199.199x198-198.198x199 199.199X198-198.198X199 199.199X198-198.198X199简算 199.199x198-198.198x199简算 199.199x198-198.198x199用简便法计算 用简便方法做 199.199x198-198.198x199 18.9x178.178+0.49-17.8x189.189 用简便算法计算:199.199X198-198.198X199 18.9x178.178+0.49-17.8X189.189 两道简便算法1.199.199X198-198.198X1992.18.9X178.178+0.49-17.8X189.189（注：X=乘号）（注：X=乘号） 1、简便计算7.5x23+31x2.50.79x0.46+7.9x0.24+11.4x0.079199.199x198-198.198x19918.9x178.178+0.49-17.8x189.189143+178x99+352、解决应用题（1)甲乙两人从相距1610米的两地相向而行,甲每分钟走65米,乙每分钟走70米.甲出发4 LINGO语法问题sets:V/1..36/;E/1..198/:x,q;B/1..12/:A;matrix(V,E):H; 36x198的矩阵;endsetsdata:A=0 1 2 3 4 5 6 7 8 9 10 11;H=...;enddata怎样实现H中每3行（前三行开始)与x向量的乘机之和为3,并且对应与H矩阵乘积的x向量 会的进 递等式0.79x0.46+7.9x0.24+11.4x0.07969316.931/69.31（3.4x4.8x9.5）/（1.9x1.7x2.4）1990x198.9-1989x198.8要巧算的~· matlab res = Columns 1 through 6[1x74 double] [1x5 double] [1x90 double] [1x198 double] [1x11 double] [1x70 double]Columns 7 through 12[1x2 double] [1x18 double] [1x129 double] [1x52 double] [1x6 double] [1x11 double]Columns 13 through 17[1x39 double x x X x x x