摘要:A.2或2.5 B.2或10 C.10或12.5 D.2或12.5
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计算或化简:
(1)(
+
)-(
-
)
(2)(
+
)(
-
)
(3)
-
-
+
(4)
×(
-
)
(5)a
+
-
(6)
(7)
×
(8)
+
-
(9)(2
+
)(2
-
)
(10)(
+1)2-2
.
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(1)(
| 45 |
| 18 |
| 8 |
| 125 |
(2)(
| 5 |
| 6 |
| 5 |
| 6 |
(3)
| 27 |
| 45 |
| 20 |
| 75 |
(4)
| 5 |
| 10 |
| 5 |
(5)a
|
| 9a |
3
| ||
|
(6)
| ||
|
(7)
| 8ab |
| 6ab3 |
(8)
|
| 16y |
| 9y |
(9)(2
| 3 |
| 5 |
| 3 |
| 5 |
(10)(
| 3 |
| 48 |
计算或解方程
(1)2×(-1)2006+
÷(-
)
(2)(-32+3)×[(-1)2010-(1-0.5×
)]
(3)
-
=2
(4)
=2x-
.
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(1)2×(-1)2006+
| 3 | 8 |
| 1 |
| 2 |
(2)(-32+3)×[(-1)2010-(1-0.5×
| 1 |
| 3 |
(3)
| x-1 |
| 0.3 |
| 0.5-0.1x |
| 0.2 |
(4)
| x+3 |
| 2 |
| x-1 |
| 3 |