题目内容
计算
÷(
+3)=______;
-(3
-2
)(3
+2
)=______.
| 18 |
| 2 |
| ||
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| 2 |
| 3 |
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| 3 |
(1)原式=3
×
+3
×
=3+
;
(2)原式=4+2
-(18-12)=2
-2.
| 2 |
| 1 | ||
|
| 2 |
| 1 |
| 3 |
| 2 |
(2)原式=4+2
| 3 |
| 3 |
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