2999+999*9999=?怎么巧算?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 20:00:53
![2999+999*9999=?怎么巧算?](/uploads/image/z/5324628-12-8.jpg?t=2999%2B999%2A9999%3D%3F%E6%80%8E%E4%B9%88%E5%B7%A7%E7%AE%97%3F)
x)3b- dg˟noT_~
fhY` [DBh @}]C$i/.H̳9 ,H
2999+999*9999=?怎么巧算?
2999+999*9999=?怎么巧算?
2999+999*9999=?怎么巧算?
3000+999*(10000-1)-1
=3000+999*10000-999*1-1
=3000+9990000-(999-1)
=3000-1000+9990000
=2000+9990000
=9992000