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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)
×
(2)(
-1)2+4
(3)
-2
.
×
(2)(
-1)2+4
(3)
-2
.
8 8 8
(2)(
-1)2+4
(3)
-2
.
5 18 5 5 18 18
-1)2+4
(3)
-2
.
2 2 2 2
(3)
-2
.
1 2 1 1 2 2
-2
.
+
+
+
27 27 27
75 75 75
3 3 3
.
12 12 12
(1)
8 |
|
(2)(
2 |
|
(3)
| ||||
|
12 |
8 |
|
(2)(
2 |
|
(3)
| ||||
|
12 |
8 |
|
(2)(
2 |
|
(3)
| ||||
|
12 |
|
5 |
18 |
5 |
18 |
5 |
18 |
5 |
18 |
2 |
|
(3)
| ||||
|
12 |
2 |
|
(3)
| ||||
|
12 |
|
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
| ||||
|
12 |
| ||||
|
27 |
75 |
3 |
27 |
75 |
27 |
75 |
27 |
75 |
3 |
3 |
3 |
12 |
12 |
▼优质解答
答案和解析
(1)原式=
=
=
;
(2)原式=(2-2
+1)+2
=3;
(3)原式=
-4
=8-4
.
×8
×8
×8
5 18 5 5 518 18 18×8=
=
;
(2)原式=(2-2
+1)+2
=3;
(3)原式=
-4
=8-4
.
20 9 20 20 209 9 9=
;
(2)原式=(2-2
+1)+2
=3;
(3)原式=
-4
=8-4
.
2
3 2
2
2
5 5 5 53 3 3;
(2)原式=(2-2
+1)+2
=3;
(3)原式=
-4
=8-4
.
2 2 2 2+1)+2
=3;
(3)原式=
-4
=8-4
.
2 2 2 2=3;
(3)原式=
-4
=8-4
.
3
+5
3
+5
3
+5
3
3 3 3 3+5
3 3 3 3
3 3 3 3-4
=8-4
.
3 3 3 3=8-4
.
3 3 3 3.
|
|
2
| ||
3 |
(2)原式=(2-2
2 |
2 |
(3)原式=
3
| ||||
|
3 |
3 |
|
5 |
18 |
5 |
18 |
5 |
18 |
5 |
18 |
|
2
| ||
3 |
(2)原式=(2-2
2 |
2 |
(3)原式=
3
| ||||
|
3 |
3 |
|
20 |
9 |
20 |
9 |
20 |
9 |
20 |
9 |
2
| ||
3 |
(2)原式=(2-2
2 |
2 |
(3)原式=
3
| ||||
|
3 |
3 |
2
| ||
3 |
5 |
5 |
5 |
5 |
(2)原式=(2-2
2 |
2 |
(3)原式=
3
| ||||
|
3 |
3 |
2 |
2 |
(3)原式=
3
| ||||
|
3 |
3 |
2 |
(3)原式=
3
| ||||
|
3 |
3 |
3
| ||||
|
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
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