问题 解答题
17
18
-
3
4
+
1
6
)÷
1
36
2
3
÷8+
1
3
×
1
8
5
16
×12×
3
4
×16                  
9
16
÷(
3
8
+
1
16
4
5
×
5
6
+
2
5
÷
3
5
4
5
÷[(
5
8
-
1
2
)÷
5
8
].
答案

(1)(

17
18
-
3
4
+
1
6
)÷
1
36

=(

17
18
-
3
4
+
1
6
)×36,

=

17
18
×36-
3
4
×36+
1
6
×36,

=34-27+6,

=7+6,

=13;

(2)

2
3
÷8+
1
3
×
1
8

=

2
3
×
1
8
+
1
3
×
1
8

=(

2
3
+
1
3
)×
1
8

=1×

1
8

=

1
8

(3)

5
16
×12×
3
4
×16,

=(

5
16
×16)×(
3
4
×12),

=5+9,

=14;

(4)

9
16
÷(
3
8
+
1
16
),

=

9
16
÷
7
16

=

9
16
×
16
7

=

9
7

(5)

4
5
×
5
6
+
2
5
÷
3
5

=

2
3
+
2
3

=

4
3

(6)

4
5
÷[(
5
8
-
1
2
)÷
5
8
],

=

4
5
÷[
1
8
÷
5
8
],

=

4
5
÷
1
5

=4.

单项选择题
单项选择题