计算

分类: 作业答案 • 2022-03-12 23:51:07

问题描述：

计算
1.345×0.345×2.69-1.345三次方-1.345×0.345二次方
要简便算法~OK？那些不懂的就别来

答

1.345*0.345*2.69-1.345^3-1.345*0.345^2
=-1.345*(-2*0.345*1.345+1.345^2+0.345^2)
=-1.345*(1.345-0.345)^2
=-1.345*1
=-1.345