题目内容
计算与化简:
(1)2
×
×
(2)
a
b-2(-3a-
b-1)÷(4a
b-3)
(结果用根式表示)
(1)2
| 3 |
| 3 | 1.5 |
| 6 | 12 |
(2)
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
(1)原式=2×3
×(
)
×12
=2×3
+
+
×2-
+2×
=6(7分)
(2)原式=
a
b-2•(-3a-
b-1)÷(2a
b-
)(10分)
=-
a
-
-
b-2-1+
=-
a-
b-
=-
(14分)
| 1 |
| 2 |
| 3 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 6 |
(2)原式=
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 2 |
=-
| 5 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 2 |
| 5 |
| 4 |
| 1 |
| 2 |
| 3 |
| 2 |
5
| ||
| 4ab2 |
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