3.14乘以3.14+68.6乘以1.314等于多少?巧算、要巧算!_数学解答

3.14乘以3.14+68.6乘以1.314等于多少?巧算、要巧算!

人气：408 ℃　时间：2020-02-07 11:05:30

解答

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