简便计算:72*55+28*56=( )
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:综合作业 时间:2024/08/04 01:00:49
简便计算:72*55+28*56=( )
![简便计算:72*55+28*56=( )](/uploads/image/z/12610570-58-0.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A72%2A55%2B28%2A56%3D%EF%BC%88+%EF%BC%89)
刘晶美,
72×55+28×56
=72×55+28×55+28
=55×(72+28)+28
=55×100+28
=5500+28
=5528
72×55+28×56
=72×55+28×55+28
=55×(72+28)+28
=55×100+28
=5500+28
=5528