摘要:22.计算下列各题.
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计算下列各题.
(1)(+
)+(-4)+(+
)+(+4)
(2)(+4
)+(-
)+(-3.2)+(-
)
(3)(-103)+(+1
)+(-97)+(+100)+(-1
)
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(1)(+
1 |
3 |
2 |
3 |
(2)(+4
1 |
5 |
5 |
6 |
1 |
6 |
(3)(-103)+(+1
3 |
4 |
1 |
4 |
计算下列各题.
(1)
-
-
(2)(x2-1)(
-
-1)
(3)
-
•
(4)
÷(x+2-
)
(5)(1-
)÷
.
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(1)
3 |
x |
6 |
1-x |
x+5 |
x2-x |
(2)(x2-1)(
1 |
x-1 |
1 |
x+1 |
(3)
1 |
x+1 |
x-3 |
x2-1 |
x2-2x+1 |
(x-1)(x-3) |
(4)
3-x |
2x-4 |
5 |
x-2 |
(5)(1-
a-b |
a-2b |
a2-4b2 |
a2-4ab+4b2 |
计算下列各题.
(1)sin230°+cos245°+
sin60°•tan45°;
(2)
+tan60°;
(3)tan2°tan4°•tan6°…tan88°. 查看习题详情和答案>>
(1)sin230°+cos245°+
2 |
(2)
cos230°+cos260° |
tan60°•cot30° |
(3)tan2°tan4°•tan6°…tan88°. 查看习题详情和答案>>