2.9*0.45+0.29*4.2+0.029*13怎样用简便方法
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2010-09-13
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2.9*0.45+0.29*4.2+0.029*13
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
2.9*0.45+0.29*4.2+0.029*13
=2.9*0.45+(0.29*10)*(4.2/10)+(0.029*100)*(13/100)
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
2.9*0.45+0.29*4.2+0.029*13
=2.9*0.45+(0.29*10)*(4.2/10)+(0.029*100)*(13/100)
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
参考资料: http://zhidao.baidu.com/question/68104955.html?fr=ala0
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展开全部
2.9*0.45+0.29*4.2+0.029*13
=2.9*0.45+(0.29*10)*(4.2/10)+(0.029*100)*(13/100)
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
=2.9*0.45+(0.29*10)*(4.2/10)+(0.029*100)*(13/100)
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
参考资料: http://zhidao.baidu.com/question/68104955.html?fr=ala0
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2.9*0.45+0.29*4.2+0.029*13
=2.9*0.45+(0.29*10)*(4.2/10)+(0.029*100)*(13/100)
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
=2.9*0.45+(0.29*10)*(4.2/10)+(0.029*100)*(13/100)
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
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2.9*0.45+0.29*4.2+0.029*13
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
=2.9*0.45+2.9*0.42+2.9*0.13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
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