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3.14x102简算

3.14x102 =3.14x(100+2) =3.14x100+3.14x2 =314+6.28 =320.28

3.14x102-6.28=3.14x102-3.14x2=3.14x(102-2)=3.14x100=314

3.14x103简便运算都3.14x103=3.14*(100+3)=3.14*100+3.14*3=314+9.42=323.42

3.14 X 1 02 6 28314 320.28

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23.5x102=23.5x(100+2)=23.5x100+23.5x2=2350+47=2397 谢谢,请采纳

3.15x102=3.15*100+3.15*2=315+6.3=321.3满意采纳奥有疑问请追问~

搜一下:4.7x99 3.14x102 3.8x10.1-0.38

解:依题意得算式,0.99*102=(1-0.01)*102=1*102-0.01*102=102-1.02=100.98 即0.99*102=100.98

3.14x48+7.2x31.4=3.14x48+72x3.14=3.14x(48+72)=3.14x120=3.14x(100+20)=3.14x100+3.14x20=314+62.8= 376.8希望帮到你 望采纳 谢谢 加油记得给问豆啊!

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