2510*3.8+215*51+2.15*1400+850*9.6+0.85*700 简便计算
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/08/03 19:14:24
2510*3.8+215*51+2.15*1400+850*9.6+0.85*700 简便计算
是2150*3.8+215*51+2.15*1400+850*9.6+0.85*700
是2150*3.8+215*51+2.15*1400+850*9.6+0.85*700
![2510*3.8+215*51+2.15*1400+850*9.6+0.85*700 简便计算](/uploads/image/z/3074090-50-0.jpg?t=2510%2A3.8%2B215%2A51%2B2.15%2A1400%2B850%2A9.6%2B0.85%2A700+%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
2150 X 3.8 + 215 X 51 + 2.15 X 1400 + 850 X 9.6 + 0.85 X 700
= 215 X 38 + 215 X 51 + 215 X 14 + 85 X 96 + 85 X 7
= 215 X (38 + 51 + 14) + 85 X (96 + 7)
= 215 X (38 + 65) + 85 X 103
= 215 X 103 + 85 X 103
= (215 + 85) X 103
= 300 X 103
= 30900
= 215 X 38 + 215 X 51 + 215 X 14 + 85 X 96 + 85 X 7
= 215 X (38 + 51 + 14) + 85 X (96 + 7)
= 215 X (38 + 65) + 85 X 103
= 215 X 103 + 85 X 103
= (215 + 85) X 103
= 300 X 103
= 30900