简便计算333.3×6.666

来源:学生作业学帮网 编辑:学帮网 时间:2024/06/04 17:24:35

简便计算333.3×6.666

333.3×6.666………………… 变一变,就简便
=(333.3×3)×2.222
=999.9×2.222
=(1000-0.1)×2.222
=1000×2.222-0.1×2.222
=2222-0.2222
=2221.7778

(333.3×30)×(6.666÷30)=9999×0.2222=(10000-1)×0.2222