用简便方法计算:6×1.6+28.8×36.8-14.4×80
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 01:33:41
![用简便方法计算:6×1.6+28.8×36.8-14.4×80](/uploads/image/z/34431-15-1.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%9A6%C3%971.6%2B28.8%C3%9736.8-14.4%C3%9780)
用简便方法计算:6×1.6+28.8×36.8-14.4×80
用简便方法计算:6×1.6+28.8×36.8-14.4×80
用简便方法计算:6×1.6+28.8×36.8-14.4×80
6×1.6+28.8×36.8-14.4×80
=9.6(1+3×36.8-120)
=9.6(1+110.4-120)
=9.6×(-8.6)
=(10-0.4)×(-8.6)
=-86+3.44
=-82.56