作业帮7.61乘9.9加0.763的简便方法
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/23 14:38:49
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
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
=4.56*67+4.56*31+4.56*2=4.56*(67+31+2)=4.56*100=456
2008×2010×（1/2008×2009+1/2009×2010)=2008×2010×(1/2008-1/2009+1/2009-1/2010)=2008×2010×(1/2008-1/2010
2·22×9·9＋6·66×6·7＝2·22×3×3·3＋6·66×6·7＝6·66×﹙3·3＋6·7﹚＝6·66×10＝66·6
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
7.63*（10-0.1）+0.763=76.3-0.763+0.763
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
5.8乘5.8加0.58乘42=5.8x5.8+5.8x4.2=5.8x(5.8+4.2)=5.8x10=5836.75乘99加36.75=36.75x(99+1)=36.75x100=367517.
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
=9.6+9.9x99=4.65x32+2.5x46.5+0.465x430=9.6+(9.9x100)-9.9=46.5x3.2+46.5x2.5+46.5x4.3=9.6+990-9.9=46.5