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题型:解答题 题类:常考题 难易度:普通
(2)解不等式组并写出它的整数解.
(2)化简: .
①2a2﹣a2=a2;
② + =2 ;
③(π﹣3.14)0× =0;
④a2÷a× =a2;
⑤sin30°+cos60°= ;
⑥精确到万位6295382≈6.30×106 .
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