问题 解答题
(1)(
22
5
×3.75÷1
5
7
)+(
1
3
+
2
3
÷2
2
9
÷3)

(2)(1-
1
2
+
1
3
-
1
4
+
1
5
)×(
4
15
×1
2
5
÷
4
15
)

(3)(3.6×
1
20
-24÷200)÷1
1
5
+
11
4
×0.2

(4)2
1
2
+0.039÷[
1
20
×(2.31÷0.077)]-0.526
答案

(1)(

22
5
×3.75÷1
5
7
)+(
1
3
+
2
3
÷2
2
9
÷3)

=(

22
5
×
15
4
×
7
12
)+(
1
3
+
2
3
×
9
20
×
1
3

=9

5
8
+(
1
3
+
1
10

=9

5
8
+
13
30

=10

7
120

(2)(1-

1
2
+
1
3
-
1
4
+
1
5
)×(
4
15
×1
2
5
÷
4
15
)

=(1-

30
60
+
20
60
-
15
60
+
12
60
)×(
4
15
×
7
5
×
15
4

=

47
60
×
4
15
×
7
5
×
15
4

=1

29
300

(3)(3.6×

1
20
-24÷200)÷1
1
5
+
11
4
×0.2

=(3.6×0.05-24÷200)÷1.2+3.75×0.2

=(0.18-0.12)÷1.2+0.75

=0.06÷1.2+0.75

=0.05+0.75

=0.8;

(4)2

1
2
+0.039÷[
1
20
×(2.31÷0.077)]-0.526

=2.5+0.039÷[0.05×30]-0.526

=2.5+0.039÷1.5-0.526

=2.5+0.026-0.526

=2.

比较题