下面的题用简便计算咋做?5.4×2.5×0.7 39.5×99+39.5
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/29 02:36:43
![下面的题用简便计算咋做?5.4×2.5×0.7 39.5×99+39.5](/uploads/image/z/12256706-2-6.jpg?t=%E4%B8%8B%E9%9D%A2%E7%9A%84%E9%A2%98%E7%94%A8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E5%92%8B%E5%81%9A%3F5.4%C3%972.5%C3%970.7+39.5%C3%9799%EF%BC%8B39.5)
下面的题用简便计算咋做?5.4×2.5×0.7 39.5×99+39.5
下面的题用简便计算咋做?
5.4×2.5×0.7 39.5×99+39.5
下面的题用简便计算咋做?5.4×2.5×0.7 39.5×99+39.5
5.4×2.5×0.7
=2.7×(2×2.5)×0.7
=2.7×5×0.7
=13.5×0.7
=9.45
39.5×99+39.5
=39.5×(99+1)
=39.5×100
=3950