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2.01x0.65简便计算

2.01x0.65=(2+0.01)x0.65=2x0.65+0.01x0.65=1.3+0.0065=1.3065

=2*0.65+0.1*0.65=1.3+0.065=1.365

2.01*0.65=(2+0.01)*0.65=2*0.65+0.01*0.65=1.3+0.0065=1.3065

=(2+0.01)*0.65=2*0.65+0.01*0.65=1.3+0.0065=1.3065

2.01*3.5的脱式计算.解:采用分配律,原式=2.01x3.5=(2+0.01)x3.5=2x3.5+0.01x3.5=7+0.035=7.035

原式=(2+0.01)x0.65=2x0.65+0.01x0.65=1.3+0.0065=1.3065

2x7.8+0.01x7.8=15.6+0.078=15.678

0.36+0.64x0.65的简便运算是什么=0.36+0.64x1-0.64x0.35=1-0.224=0.776

0.36+0.64x0.65=0.36+0.416=0.776

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