问题 解答题
1
4
17
×(2
2
3
-
3
4
)-(6
6
7
-3
9
13
)÷(3
3
7
-2
2
11
)×
13
33
+17
11
12
÷
17
21
答案

1

4
17
×(2
2
3
-
3
4
)-(6
6
7
-3
9
13
)÷(3
3
7
-2
2
11
)×
13
33
+17
11
12
÷
17
21

=1

4
17
×(2-
1
12
)-(3+
15
91
)÷(1+
19
77
)×
13
33
+(17+
11
12
)÷
17
21

=

21
17
×
23
12
-
288
91
÷
96
77
×
13
33
+17÷
17
21
+
11
12
÷
17
21

=

21
17
×
23
12
-
288
91
×
77
96
×
13
33
+21+
11
12
×
21
17

=

21
17
×(
23
12
+
11
12
)-1+21

=

7
2
-1+21

=23.5.

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