用简便计算3.14*3.14+68.6*1.314

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用简便计算3.14*3.14+68.6*1.314用简便计算3.14*3.14+68.6*1.314用简便计算3.14*3.14+68.6*1.3143.14*3.14+68.6*1.314=3.14

用简便计算3.14*3.14+68.6*1.314
用简便计算3.14*3.14+68.6*1.314

用简便计算3.14*3.14+68.6*1.314
3.14*3.14+68.6*1.314
=3.14*3.14+68.6*(1+0.314)
=3.14*3.14+68.6*1+6.86*3.14
=3.14*(3.14+6.86)+68.6
=3.14*10+68.6
=31.4+68.6
=100

=3.14*3.14+68.6*(1+0.314)=68.6+(3.14+6.86)*3.14=68.6+31.4=100