21.9-9.22-0.78+8.1怎么简便运算?
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 13:01:15
![21.9-9.22-0.78+8.1怎么简便运算?](/uploads/image/z/364419-27-9.jpg?t=21.9-9.22-0.78%2B8.1%E6%80%8E%E4%B9%88%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%3F)
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21.9-9.22-0.78+8.1怎么简便运算?
21.9-9.22-0.78+8.1怎么简便运算?
21.9-9.22-0.78+8.1怎么简便运算?
原式=(21.9+8.1)-(9.22+0.78)
=30-10
=20
21.9-9.22-0.78+8.1
=21.9+8.1-(9.22+0.78)
=30-10
=20
(21.9+8.1)-(9.22+0.78)
21.9-(9.22+0.78)+8.1