简便计算:8.57-2.47+3.43+5.47
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 00:12:27
![简便计算:8.57-2.47+3.43+5.47](/uploads/image/z/9457588-28-8.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%9A8.57-2.47%2B3.43%2B5.47)
简便计算:8.57-2.47+3.43+5.47
简便计算:8.57-2.47+3.43+5.47
简便计算:8.57-2.47+3.43+5.47
8.57-2.47+3.43+5.47
=8.57+3.43+(5.47-2.47)
=12+3
=15
8.57+3.43+(5.47-2.47)=15
8.57-2.47+3.43+5.47
=(8.57 + 3.43) +(5.47 - 2.47)
= 12 + 3
= 15
8.57-2.47+3.43+5.47=(8.57+3.43)+(5.47-2.47)=12+3=15
(8.57-2.47)+(3.43+5.47)
=6.1+8.9
=15
5.47-2.47+8.57+3.43=3+12=15
8.57-2.47+3.43+5.47=8.57+3.43+5.47-2.47=12+3=15