简便计算89*49-49*49
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 17:32:19
![简便计算89*49-49*49](/uploads/image/z/443431-55-1.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%9789%2A49-49%2A49)
简便计算89*49-49*49
简便计算89*49-49*49
简便计算89*49-49*49
简便计算89*49-49*49
=(89-49)×49
=40×(50-1)
=2000-40
=1960;
如果本题有什么不明白可以追问,
=(89-49)*49=40*49=40*(50-1)=2000-40=1960
89*49-49*49
=(89-49)*49
=40*49
=40*(50-1)
=40*50-40*1
=2000-40
=1960