题目内容
计算:
(1)2 -
+
+
-
.
(2)
•4
•
•0.25
(3
•9
)2.
(1)2 -
1 |
2 |
(-4)0 | ||
|
1 | ||
|
(1-
|
(2)
2 |
1 |
2 |
3 | 82 |
1 |
3 |
1 |
3 |
1 |
3 |
(1)2-
+
+
-
=
+
+
-1
=
+
+1-1
=2
.
(2)
•4
•
•0.25
(3
•9
)2
=2
×(22)
×22×(
)
×32
=2
×2×22×2-6
=2
+1+2-6
=2-
=
.
1 |
2 |
(-4)0 | ||
|
1 | ||
|
(1-
|
=
| ||
2 |
| ||
2 |
| ||||
(
|
=
2 |
2 |
=2
2 |
(2)
2 |
1 |
2 |
3 | 82 |
1 |
3 |
1 |
3 |
1 |
3 |
=2
1 |
2 |
1 |
2 |
1 |
4 |
1 |
3 |
=2
1 |
2 |
=2
1 |
2 |
=2-
5 |
2 |
=
| ||
8 |
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