简便方法：2.71×6.5+0.21×27.1+2.71

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简便方法：2.71×6.5+0.21×27.1+2.71简便方法：2.71×6.5+0.21×27.1+2.71简便方法：2.71×6.5+0.21×27.1+2.71=2.71x6.5+2.1x2.

简便方法：2.71×6.5+0.21×27.1+2.71
简便方法：2.71×6.5+0.21×27.1+2.71

简便方法：2.71×6.5+0.21×27.1+2.71
=2.71x6.5+2.1x2.71+2.71x1
=2.71x（6.5+2.1+1）
=2.71x9.6
=26.016

简便方法：2.71×6.5+0.21×27.1+2.71 39*25*2简便方法 990/2/9简便方法简便方法, 简便方法简便方法, 简便方法, 用简便方法计算1/27+2/27+3/27+.+26/27 简便/简便/简便 4.5*3.6+4.5*6.5-4.5简便方法 6.5×9.9+0.65用最简便方法 9.6*6.5-65*0.65,简便方法 1.02*6.5用简便方法怎样做, 简便方法计算99^2-101^2 (999^2)-(1000^2) 简便方法计算简便方法计算:555^2-445^2 2×2×C,用简便方法表示 98×99分之2简便方法计算 29*(20-2)怎样用简便方法计算?