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:2024/07/02 05:40:06
![4.99+4.99+4.99+0.04+4.99 怎么简便计算快·········!](/uploads/image/z/190577-65-7.jpg?t=4.99%2B4.99%2B4.99%2B0.04%2B4.99+%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E5%BF%AB%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%21)
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