题目内容
化简:①
-
-
+(
-2)0+
②(
+
)2-(
-
)2.
| 18 |
|
| ||||
|
| 3 |
(1-
|
②(
| a |
| 1 | ||
|
| a |
| 1 | ||
|
①
-
-
+(
-2)0+
,
=3
-
-1-
+1+
-1,
=
+1;
②(
+
)2-(
-
)2,
=[
+
+(
-
)][
+
-(
-
)],
=2
×
,
=4.
| 18 |
|
| ||||
|
| 3 |
(1-
|
=3
| 2 |
3
| ||
| 2 |
| 2 |
| 2 |
=
3
| ||
| 2 |
②(
| a |
| 1 | ||
|
| a |
| 1 | ||
|
=[
| a |
| 1 | ||
|
| a |
| 1 | ||
|
| a |
| 1 | ||
|
| a |
| 1 | ||
|
=2
| a |
| 2 | ||
|
=4.
练习册系列答案
相关题目