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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