13.4乘0.24加3.98的简便计算小学五年级

33333×44444+22222×33334=33333×2×22222+22222×33334=66666×22222+22222×33334=22222×(66666+33334)=22222×

拿计算器算简单吧又快又准中国的教育就是这样很简单的事情要弄的很复杂都什么世纪了还要用原始的方法解决问题

13.4X0.24+3.98=6.7X2X0.3X0.8+3.98=6.7X0.3X1.6+3.98=2.01X1.6+3.98=3.216+4-0.02=7.196

9.13×0.2+91.3×0.08=9.13×0.2+9.13×0.8=9.13╳（0.2+0.8）=9.13

67.5x23+450x6.75+675x3.2=675x2.3+4.5x675+675x3.2=675x(2.3+4.5+3.2)=675x(2.3+3.2+4.5)=675x(5.5+4.5)=6

36×56+72×22=36×2×28﹢36×2×22=36×2×﹙28+22）=36×2×50=3600

8.88×9+28×1.11＝1.11×8×9+28×1.11＝1.11×（72+28）＝1.11×100＝111

（10-0.4）X2835＝28350－1134＝272162.85X4＝11.4结果＝27237.4

=4.56*67+4.56*31+4.56*2=4.56*(67+31+2)=4.56*100=456

0.79×0.64+7.9×0.24+11.4×0.079=0.79×0.64+0.79×2.4+1.14×0.79=0.79×（0.64+2.4+1.14）=0.79×4.18=3.3022

2008×2010×（1/2008×2009+1/2009×2010)=2008×2010×(1/2008-1/2009+1/2009-1/2010)=2008×2010×(1/2008-1/2010

0.79X0.46+7.9X0.24+11.4X0.079=0.79X0.46+0.79X2.4+1.14X0.79=0.79X（0.46+2.4+1.14）=0.79X4=3.16翁锦文为你解答,如

7.25乘67.88加725乘0.7875加7250乘0.05337=7.25*67.88+7.25*78.75+7.25+53.37=7.25*(67.88+78.75+53.37)=7.25*20

(3.14X30)2+188.4X15+3.14X5X2X20=8873.64+2826+628=12291.64

55×66+66×77+77×88+88×99=11×5×11×6+11×6×11×7+11×7×11×8+11×8×11×9=11×11×(5×6+6×7+7×8+8×9)=121×200=2420

经过察看可以发现,每个乘法式子里都包含乘数0.79的倍数,经过变换,可以把0.79提取出来,办法如下：\x0d0.79*0.46+7.9*0.24+11.4*0.079

经过观察可以发现,每个乘法式子里都包含乘数0.79的倍数,经过变换,可以把0.79提取出来,方法如下：0.79*0.46+7.9*0.24+11.4*0.079=0.79*0.46+0.79*2.4+

1*3*5+3*9*15+7*21/35*2*3+3*6*9+7*14*21=15+405+25.2+162+2058=2665.2或把3分别提出,变成3（5+9*15+14*24/35+6*9+7*

=12.5×69+(53+72)×3.1=125×6.9+125×3.1=125×(69+31)=125×100=1250

2.61*39.5+0.7*261+9.05*26.1=26.1*3.95+26.1*7+26.1*9.05=26.1*(3.95+7+9.05)=26.1*20=522