试题:
9
14
×3.5+
1
6
)÷(13
1
3
-3
3
4
÷
5
16
)÷5
1
4
×
4
21

答案:

我来补答
9
14
×3.5+
1
6
)÷(13
1
3
-3
3
4
÷
5
16
)÷5
1
4
×
4
21

=(
9
14
×
7
2
+
1
6
)÷(13
1
3
-
15
4
×
16
5
)÷5
1
4
×
4
21

=(
9
4
+
1
6
)÷(13
1
3
-12)÷5
1
4
×
4
21

=
29
12
×
3
4
×
4
21
×
4
21

=
29
441
 
 
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