369*0.99+3.69简便计算

分类: 作业答案 • 2021-12-20 01:22:43

问题描述：

369*0.99+3.69简便计算

答

提出3.69得：3.69*(100*0.99+1)=3.69*(99+1)=3.69*100=369

答

(370-1)(1-0.01)+3.69=370-3.70-1+0.01+3.69=369

答

369*0.99+3.69
=369*0.99+369*0.01
=369*（0.99+0.01）
=369

答

369*0.99+3.69
=3.69*99+3.69
=3.69*(99+1)
=3.69*100
=369