简便方法计算9.01×1.55+9.02×1.54+9.03×1.53+9.04×1.52
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 15:55:00
![简便方法计算9.01×1.55+9.02×1.54+9.03×1.53+9.04×1.52](/uploads/image/z/48834-18-4.jpg?t=%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%979.01%C3%971.55%2B9.02%C3%971.54%2B9.03%C3%971.53%2B9.04%C3%971.52)
简便方法计算9.01×1.55+9.02×1.54+9.03×1.53+9.04×1.52
简便方法计算9.01×1.55+9.02×1.54+9.03×1.53+9.04×1.52
简便方法计算9.01×1.55+9.02×1.54+9.03×1.53+9.04×1.52
9.01×1.55+9.02×1.54+9.03×1.53+9.04×1.52
=9.01×1.55+9.02×(1.55-0.01)+9.03×(1.55-0.02)+9.04×(1.55-0.03)
=9.01×1.55+9.02×1.55-9.02×0.01+9.03×1.55-9.03×0.02+9.04×1.55-9.04×0.03
=(9.01+9.02+9.03+9.04)×1.55-(9.02×0.01+9.03×0.02+9.04×0.03)
=(36+0.1)×1.55-(0.0902+0.1806+0.2712)
=36×1.55+0.1×1.55-0.542
=55,8+0.155-0.542
=55.413