问题 解答题
8
4
5
+5.25+1.2+2
3
4
=
答案

8

4
5
+5.25+1.2+2
3
4

=8.8+5.25+1.2+2.75,

=(8.8+1.2)+(5.25+2.75),

=10+8,

=18.

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