如何简便计算?(5.1-1.49-1.49)
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/13 21:54:55
如何简便计算?(5.1-1.49-1.49)
![如何简便计算?(5.1-1.49-1.49)](/uploads/image/z/1535464-64-4.jpg?t=%E5%A6%82%E4%BD%95%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%3F%285.1-1.49-1.49%29)
(5.1-1.49-1.49)
=(5.1+0.01+0.01)-1.49-0.01-1.49-0.01
=5.12-1.5-1.5
=5.12-3
=2.12
=(5.1+0.01+0.01)-1.49-0.01-1.49-0.01
=5.12-1.5-1.5
=5.12-3
=2.12