3.6x42.3x3.75-12.5x0.423x28五年级简算

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3.6x42.3x3.75-12.5x0.423x28五年级简算
3.6x42.3x3.75-12.5x0.423x28五年级
简算

3.6x42.3x3.75-12.5x0.423x28五年级简算
3.6x42.3x3.75-12.5x0.423x28
=4.23*(36*3.75-5*7)
=4.23*5*(36*0.75-7)
=42.3/2*(9*3-7)=42.3*10
=423

3.6x42.3x3.75-12.5x0.423x28
=4.23*(36*3.75-1.25*28)
=4.23*(108+27-28-7)
=4.23*(80+20)
=423

423

3.6*42.3*3.75-12.5*0.423*28
=3.6*42.3*3.75-12.5*42.3*0.28
=3.6*42.3-12.5*0.28
=152.28-3.5
=148.78

求3.6x42.3x3.75-12.5x0.423x28的简便运算 3.6x42.3x3.75-12.5x0.423x28五年级简算 3.6x42.3x3.75一12.5x0.423X28 用简算 13.6x42.3x3.75—12.5x0.423x2816x14.97÷199675x4.67+17.9x2.519.98x37+199.8x2.3+9.99x801.01+1.04+1.07+···+3.980.1+0.3+0.5+···+19.7+19.96.03+6.06+6.09+···7.950.02+0.04+0.06+0.08+···+0.22+0.24+···+0.96+0.98 2x3/1+3x4/1+4x5/1.41x42/1的和 12.5x0.25x3.2如何简便运算 2/1X3/1+3/1x4/1+4/1x5/1+5/1x6/1.41/1X42/1的和巧算下列各题（1）（4.5x7.5x4.8）÷（1.5x2.5x2.4）（2）（51x68x78）÷（17x34x1.3）（3）（0.81x0.75x0.48）÷（0.25x0.24x0.27）（4）（0.39x0.7）÷（0.56x3.9） 1:6.27x3.6+37.8x0.36 2:369x0.99+3.69 3:13.5x2.5-0.35x25 2x3.14x0.25²+2x3.14x0.25x0. 用牛顿迭代法求下列方程在1.5附近的根：2x3-4x2+3x-6=0.#include math.hmain(){float x,x0,f,f1; x=1.5;do{x0=x;f=2*x0*x0*x0-4*x0*x0+3*x0-6;f1=6*x0*x0-8*x0+3;x=x0-f/f1; }while(fabs(x-x0)>=1e-5);printf (%f ,x); }想请教下这一步： 3x0.6=1.8,33x3.6=11.88,333x33.6=111.888,求3.33...3X33...3.6=?其中20个3 3x0.6=1.8,33x3.6=11.88,333x33.6=111.88求3.33...3x33...3.6=?其中3都是20个. 1.25X0.25X3.2简便方法 1.25X0.25X3.2简算 13x0.43-0.43x3简便计算 0.54x3.6+5.4x0.64=? 练习册80) 用简便方法计算（o.75x42.6—o.574x25+57.4)÷3