如何简便计算2.4X0.8-4.48chu2.8
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/30 15:31:56
![如何简便计算2.4X0.8-4.48chu2.8](/uploads/image/f/3526681-49-1.jpg?t=%E5%A6%82%E4%BD%95%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%972.4X0.8-4.48chu2.8)
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
再答:如果满意请采纳谢谢
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
这个没法简算52.5x0.63+3.7x0.5=33.075+1.85=34.925
1.25x0.25x0.05x64=1.25x0.25x0.05x8×8=1.25x8x0.25x(0.05x8)=10x0.25x0.4=2.5x0.4=1
8.45X0.27+8.45X0.63+0.845=8.45X0.27+8.45X0.63+0.845x1=8.45X0.27+8.45X0.63+8.45x0.1=8.45X(0.27+0.63+0
你好:(125+1.25+12.5)x0.8=125×0.8+1.25×0.8+12.5×0.8=100+1+10=111
1.25X0.7X0.8=1.25X0.8X0.7=1X0.7=0.7希望对您有所帮助
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
再问:第一题中间那个黑黑的是x号吗再答:对
102x0.35=(100+2)x0.35=100x0.35+2x0.35=35+0.7=35.7
0.125x4.8x0.25=0.125×8×(0.25×2)×0.3=1×0.5×0.3=0.15
=0.3×(2.5×0.4)=0.3×1=0.3
(99+1)×0.027再答:=2.7
5.4÷(3.94+0.86)x0.8=5.4÷4.8x0.8=5.4÷(4.8÷0.8)=5.4÷6=0.9
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
解题过程如下:=(7.54+2.46)*0.25=10*0.25=2.5希望我的回答对你有所帮助.