问题 解答题
计算下面各题.
1
5
×4÷
4
5
3
14
+
3
14
×13
4
25
×
3
8
÷
4
25
×
3
8
3
8
-0.3×
5
6
68×(
15
17
-
9
34
[1-(
1
4
+
3
8
)]÷
1
4
答案

(1)

1
5
×4÷
4
5

=

1
5
×4×
5
4

=1;

(2)

3
14
+
3
14
×13,

=

3
14
×(13+1),

=

3
14
×14,

=3;

(3)

4
25
×
3
8
÷
4
25
×
3
8

=

4
25
×
3
8
×
25
4
×
3
8

=

9
64

(4)

3
8
-0.3×
5
6

=

3
8
-
3
10
×
5
6

=

3
8
-
1
4

=

1
8

(5)68×(

15
17
-
9
34
),

=68×

15
17
-68×
9
34

=60-18,

=42;

(6)[1-(

1
4
+
3
8
)]÷
1
4

=[1-

5
8
1
4

=

3
8
×4,

=

3
2

单项选择题 A3/A4型题
单项选择题 A1/A2型题