题目内容

(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
(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.
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