9.8*4.8+0.48简便计算
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9.8*4.8+0.48简便计算
9.8*4.8+0.48简便计算
9.8*4.8+0.48简便计算
=98*0.48+0.48=(98+1)0.48=99*0.48=(100-1)*0.48=48-0.48=47.52
9.8*4.8+0.48=98*0.48+0.48=(98+1)*0.48=99*0.48=(100-1)*0.48=100*0.48-0.48*1=48-0.48=47.52