作业帮简便方法9.9X0.72
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 02:07:55
0.027+9.9x0.27=0.27×0.1+9.9×0.27=0.27×(0.1+9.9)=0.27×10=2.7
(-3分之4)的9次方X0.75的10次方=-(3分之4×0.75)的9次方X0.75=-1的9次方×0.75=-0.75
72*0.9*0.9+10.4再问：列递式再答：0.8*0.9*0.9*0.9+0.8*13=（0.9*0.9*0.9+13）*0.8=（0.072+13）*0.8再问：不对再答：哦哦0.8*90*0
=3.75-4*0.25*1.2=3.75-1.2=2.55
(46.3+53.7)x0.56+0.056=56.056
2.5x4.4=0.25*44=44/4=1132x0.25x12.5=(8*4)*0.25*12.5=(4*0.25)*(8*12.5)=1*100=1003.64x0.8+6.36x0.8-3.8
5.28X0.99=5.28×（1-0.01）=5.28-0.0528=5.2272；很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以追问,
4.38÷(36.94+34.3x0.2)=4.38÷(36.94+6.86)=4.38÷43.8=0.1~如果你认可我的回答,请及时点击【采纳为满意回答】按钮~~手机提问者在客户端右上角评价点【满意
有简便方法,方法如下：根据(x-0.1)^3=x^3-0.3x^2+0.03x-0.001,把x=1代入即得,原式=1-0.3+0.03-0.001=0.729
15x888＋32x0.125x0.25=15×8×111+4×8×0.125×0.25=120×(100+10+1)+(1×1)=12000+1200+120+1=1332119.98x37－199
99.99X0.8+11.11X2.8=11.11X9X0.8+11.11X2.8=11.11X7.2+11.11X2.8=11.11X（7.2+2.8）=11.11X10=111.1
7.2x1.47+14.7x0.28=（7.2+2.8）x1.47=10x1.47=14.7
3.75x4.8+62.5x0.48=37.5×0.48+62.5×0.48=0.48×（37.5+62.5）=0.48×100=48如有不明白,可以追问如有帮助,记得采纳,谢谢
0.27+9.9x0.27=0.27+(10-0.1)x0.27=0.27+10x0.27-0.27x0.1=0.27+2.7-0.027=2.943
(99+1)×0.027再答：=2.7
运用乘法分配律简便计算.6.5×68+6.5×31+6.5=6.5×（68+31+1）＝6.5×100=6500.27×0.12十0.88×0.27=.27×（0.12+0.88）＝0.27×1＝0.
5.4x19.9x0.54=5.4x19.9x5.4×0.1=5.4×（19.9+0.1）=5.4×20=108再问：不对再答：5.4x19.9x0.54=58.0284你的题出错了，要不然无法简便运
7.6x0.19+0.76x8.1=7.6X(0.19+0.81)=7.6X1=7.6
原式=128÷4×1/8×1/4=32×1/32=1