计算：（每小题6分，共24分）(1) (2) (3) (4) &n...
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| （1）  （2）-16 （3）-49 （4）-19 |
| (1) 解：原式  ····································································· 1分 ································································ 2分 ··········································································· 4分 ·················································································· 6分(2) 解：原式  ························································· 1分 ······························································ 4分 ·········································································· 5分 ················································································ 6分(3) 解：原式  ·························································· 3分 ······································································ 4分 ················································································ 6分(4) 解：原式  ···················································· 2分 ······························································ 3分 ····································································· 4分 ··········································································· 5分 ··············································································· 6分 |
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