用简便计算3.14*3.14+68.6*1.314_数学解答

用简便计算3.14*3.14+68.6*1.314

人气：476 ℃　时间：2019-12-09 19:17:23

解答

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