灵鹊做题网1.25x0.25x32用简便法计算
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/14 15:49:35
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
4.65*32+46.5+0.465*430=46.5*3.2+46.5*1+46.5*4.3=46.5*（3.2+1+4.3）=46.5*8.5（不知道算没算错哈）
=3.75-4*0.25*1.2=3.75-1.2=2.55
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
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
6.4X0.25十3.6÷4=6.4X0.25十3.6X0.25=0.25X(6.4+3.6)=0.25X10=2.5
1.25x0.7x0.8=（1.25×0.8）×0.7=1×0.7=0.7再问：那9.8x25呢
1.25x0.25x0.05x64=1.25x0.25x0.05x8×8=1.25x8x0.25x(0.05x8)=10x0.25x0.4=2.5x0.4=1
4.65x32+2.5x46.5+0.465x430=4.65x32+25x4.65+4.65x43=4.65x(32+25+43)=4.65x100=465
13.72*0.25+6.28/4=13.72*0.25+6.28*0.25=(13.72+6.28)*0.25=20*0.25=5
1.25X0.7X0.8=1.25X0.8X0.7=1X0.7=0.7希望对您有所帮助
125×32=125×(4×8)=125×4×8=500×8=4000不明白可以追问,如果有帮助,请选为满意回答!再问：要一篇发言稿要求：1.先赞美老师2.再向父母感恩，说出心里话。我是单翼天使是家长
再问：第一题中间那个黑黑的是x号吗再答：对
0.125x4.8x0.25=0.125×8×（0.25×2）×0.3=1×0.5×0.3=0.15
61.6x0.125+9.2x0.25+48.8x5=30.8*0.25+9.2*0.25+48.8*5=40*0.25+244=10+244=254
6.5/4+3.5×0.25=6.5×0.25+3.5×0.25=(6.5+3.5)×0.25=10×0.25=2.5