问题 解答题
1
12
×
3
5
+
1
3
÷
5
12
5
8
-
1
4
÷
5
12
)×(1+
2
3
(
2
3
+
1
4
3
11
+
3
8
32÷
4
5
-17.5-2.5
2
11
×55+
3
5
÷
1
25
5
11
+5×
5
11
+
5
11
×5
答案

(1)

1
12
×
3
5
+
1
3
÷
5
12

=

1
20
+
4
5

=

17
20

(2)(

5
8
-
1
4
÷
5
12
)×(1+
2
3
),

=(

5
8
-
3
5
)×
5
3

=

1
40
×
5
3

=

1
24

(3)(

2
3
+
1
4
)×
3
11
+
3
8

=

11
12
×
3
11
+
3
8

=

1
4
+
3
8

=

5
8

(4)32÷

4
5
-17.5-2.5,

=40-20,

=20;

(5)

2
11
×55+
3
5
÷
1
25

=10+15,

=25;

(6)

5
11
+5×
5
11
+
5
11
×5,

=

5
11
×(1+5+5),

=

5
11
×11,

=5.

填空题
选择题