2.9x9.9 0.29的简算

2.9x9.9+0.29=2.9x9.9+2.9x0.1=2.9x(9.9+0.1)=2.9x10=29

2.9*9.9+0.29 =0.29*99+0.29 =0.29*(99+1) =0.29*100 =29

2.9*9.9+0.29=2.9x9.9+2.9x0.1=2.9x(9.9+0.1)=2.9x10=29

2.9x9.9十0.29=2.9*9.9+2.9*0.1=2.9*(9.9+0.1)=2.9*10=290.96x2.5=0.24*(4*2.5)=0.24*10=2.4

2.9*9.9+0.29=2.9*9.9+2.9*0.1=2.9*(9.9+0.1)=2.9*10=29

2.9x9.9+0.29=0.29*99+0.29*1=0.29*(99+1)=0.29*100=29

2.9十2.9X9.9=2.9-0.29+29=31.61

0.029+0.29*9.9=0.29x(0.1+9.9)=0.29x10=2.9

2.9x9.9+0.29提取0.29得0.29*(10*9.9+1)=0.29*100=29

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