问题 解答题
(2
2
5
+1
1
3
×5)÷3
2
5
-1
1
3
答案

(2

2
5
+1
1
3
×5)÷3
2
5
-1
1
3

=(2

2
5
+6
2
3
)÷3
2
5
-1
1
3

=

136
15
×
5
17
-1
1
3

=2

2
3
-1
1
3

=1

1
3

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