用简便计算,3.14*1.9+31.4*8.1
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/15 01:54:35
![用简便计算,3.14*1.9+31.4*8.1](/uploads/image/z/3814193-65-3.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C3.14%2A1.9%2B31.4%2A8.1)
用简便计算,3.14*1.9+31.4*8.1
用简便计算,3.14*1.9+31.4*8.1
用简便计算,3.14*1.9+31.4*8.1
3.14*1.9+31.4*0.81
=31.4*0.19+31.4*0.81
=31.4*(0.19+0.81)
=31.4
你是不是写错了 有个小数点写错位置了啊
31.4
3.14*1.9+31.4*0.81
=31.4*0.19+31.4*0.81
=31.4*(0.19+0.81)
=31.4