78x87-87x68的简便方法
怎样简便计算1到100的乘法算式? -
x(41x42x43x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97x98x99x100) 好象是这么算得应该最简便了你算算看是什么。
87×68+87×32 =87×（68+32）87×100 =8700
x(41x42x43x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97x98x99x100) 好象是这么算得应该最简便了你算算看是什么。
87×68+87×32 =87×（68+32）87×100 =8700
这道题用简便算法就可以了，用87-57=30，然后再用30×68，等于2040
年代 2008 厂家 Mercedes-Benz（奔驰）车型 S350 4MAITC Bodystyle 加长轴距车型动力系统 3.5L 汽油发动机配套7速手自动变速器约束系统 驾驶员和副驾驶安全气囊、侧气囊以及窗帘式气囊，前座三点式主动安全带，后座三点式安全带和侧气囊产地 德国斯图加特Sindelfingen市车辆档说完了。
1X2X3……X100=? 有什么简便方法吗? -
x(31x32x33x34x35x36x37x38x39x40)x(41x42x43x44x45x46x47x48x49x50)x(51x52x53x4x55x56x57x58x59x60)x(61x62x63x64x65x66x67x68x69x70)x(71x72x73x74x75x76x77x78x79x80)(81x82x83x84x85x86x87x88x89x90)x(90x91x92x93x94x95x96x97x98x99x100)后面会介绍。