3.999+0.999+2.999+9.9用简便方法计算
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 14:17:54
![3.999+0.999+2.999+9.9用简便方法计算](/uploads/image/z/745504-16-4.jpg?t=3.999%2B0.999%2B2.999%2B9.9%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97)
3.999+0.999+2.999+9.9用简便方法计算
3.999+0.999+2.999+9.9用简便方法计算
3.999+0.999+2.999+9.9用简便方法计算
3.999+0.999+2.999+9.9
=(4-0.001)+(1-0.001)+(3-0.001)+(10-0.1)
=(4+1+3)+10-3*0.001-0.1
=18-0.1-0.003
=17.897