3.14乘以3.14+68.6乘以1.314等于多 - 知识问答

3.14乘以3.14+68.6乘以1.314等于多少?巧算、要巧算!

1个回答

3.14*3.14+68.6*1.314
=3.14*3.14+68.6*(1+0.314)
=3.14*3.14+6.86*3.14+68.6
=3.14*(3.14+6.86)+68.6
=31.4+68.6
=100

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