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计算(1)8×518(2)(2-1)2+412(3)27+753-212.

题目详情
计算
(1)
8
×
5
18
      
(2)(
2
-1)2+4
1
2
         
(3)
27
+
75
3
-2
12

8
×
5
18
      
(2)(
2
-1)2+4
1
2
         
(3)
27
+
75
3
-2
12
8
8
8
8
5
18
      
(2)(
2
-1)2+4
1
2
         
(3)
27
+
75
3
-2
12
5
18
5
18
5
18
5
18
5
18
518551818
2
-1)2+4
1
2
         
(3)
27
+
75
3
-2
12
2
2
2
22
1
2
         
(3)
27
+
75
3
-2
12
1
2
1
2
1
2
1
2
1
2
121122
27
+
75
3
-2
12
27
+
75
3
27
+
75
3
27
+
75
27
+
75
27
27
27
27
75
75
75
75
3
3
3
3
3
3
12
12
12
12
12
▼优质解答
答案和解析
(1)原式=
5
18
×8
=
20
9
=
2
5
3

(2)原式=(2-2
2
+1)+2
2
=3;
(3)原式=
3
3
+5
3
3
-4
3
=8-4
3
5
18
×8
5
18
×8
5
18
×8
5
18
×8
5
18
518555181818×8=
20
9
=
2
5
3

(2)原式=(2-2
2
+1)+2
2
=3;
(3)原式=
3
3
+5
3
3
-4
3
=8-4
3
20
9
20
9
20
9
20
9
20
9
209202020999=
2
5
3

(2)原式=(2-2
2
+1)+2
2
=3;
(3)原式=
3
3
+5
3
3
-4
3
=8-4
3
2
5
3
2
5
32
5
2
5
2
5
5
5
55333;
(2)原式=(2-2
2
+1)+2
2
=3;
(3)原式=
3
3
+5
3
3
-4
3
=8-4
3
2
2
2
22+1)+2
2
=3;
(3)原式=
3
3
+5
3
3
-4
3
=8-4
3
2
2
2
22=3;
(3)原式=
3
3
+5
3
3
-4
3
=8-4
3
3
3
+5
3
3
3
3
+5
3
3
3
3
+5
3
3
3
+5
3
3
3
3
3
33+5
3
3
3
33
3
3
3
3
3
33-4
3
=8-4
3
3
3
3
33=8-4
3
3
3
3
33.