4.99+4.99+4.99+0.04+4.99 怎么简便计算快·········!

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/15 08:10:26
4.99+4.99+4.99+0.04+4.99 怎么简便计算快·········!

4.99+4.99+4.99+0.04+4.99 怎么简便计算快·········!
4.99+4.99+4.99+0.04+4.99 怎么简便计算
快·········!

4.99+4.99+4.99+0.04+4.99 怎么简便计算快·········!
4.99+4.99+4.99+0.04+4.99
=4.99+4.99+4.99+0.01+0.01+0.01+0.01+4.99
=(4.99+0.01)+(4.99+0.01)+(4.99+0.01)+(4.99+0.01)
=5+5+5+5
=20

原式=4.99+0.01+4.99+0.01+4.99+0.01+4.99+0.01=5+5+5+5=20