问题 解答题
用递等式计算.
(1)0.48+10.8÷0.36×0.54

(2)[9.08-(0.61+1.75)]+3.2
(3)
13
14
-
15
28
÷
5
8
+
1
4
(4)
4
5
÷[(
3
4
-
2
3
5
8
]
答案

(1)0.48+10.8÷0.36×0.54,

=0.48+30×0.54,

=0.48+16.2,

=16.68;

(2)[9.08-(0.61+1.75)]+3.2,

=[9.08-2.36]+3.2,

=6.72+3.2,

=9.92;

(3)

13
14
-
15
28
÷
5
8
+
1
4

=

13
14
-
15
28
×
8
5
+
1
4

=

13
14
-
6
7
+
1
4

=

1
14
+
1
4

=

9
28

(4)

4
5
÷[(
3
4
-
2
3
)÷
5
8
],

=

4
5
÷[
1
12
÷
5
8
],

=

4
5
÷[
1
12
×
8
5
],

=

4
5
÷
2
15

=

4
5
×
15
2

=6.

单项选择题 案例分析题
单项选择题