kiem tra giua hoc ki I toan 7
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<span class='text_page_counter'>(1)</span>Trêng THCS Thä vùc. Bµi thi kh¶o s¸t chÊt lîng gi÷a k× I. N¨m häc 2012-2013 (Thêi gian lµm bµi 90 phót). M«n to¸n : Líp 7. Hä vµ tªn......................................................................................Líp 7................................ Sè b¸o danh Gi¸m thÞ 1 Gi¸m thÞ 2 Sè ph¸ch. §iÓm b»ng sè. §iÓm b»ng ch÷. Gi¸m kh¶o. Sè ph¸ch. I. PHẦN TRẮC NGHIỆM : ( 3 điểm ) Chọn phương án trả lời đúng trong các câu sau: Câu 1(0,5 điểm) Kết quả đúng của phép tính 0,8 9 là: A. 0,8 + 9 = 9,8 B. 0,8 – 0,9 = - 0,1 C. 3,8và 0,8 D.cả ba câu trên đều đúng. Câu 2.(0,5 điểm) Nếu có a.b = c.d ta suy ra: d c d b c b A. B. C. b a a c a d D. Cả ba câu trên đều đúng. 1 2 x.1,5 2 5 là: Câu 3. (0,5 điểm) Tìm x,biet 1 1 A. 15 B. 0,0(6) C. cả A&B D. 4 Câu 4.(0,5 điểm) Cho ba đường thẳng a, b, c phân biệt. Biết a c, b c ta suy ra: A. a và b phân biệt. B. a và b cắt nhau. C. a và b song song. D.a trùng b. Câu 5. (0,5 điểm)Trong các câu sau, câu nào sai? A. Hai tia phân giác của hai góc kề bù thì vuông góc với nhau. B. Hai góc bằng nhau thì đối đỉnh. C. Hai đường thẳng phân biệt cùng vuông góc với một đường thẳng thứ ba thì chúng song song với nhau. D. Nếu một đường thẳng cắt hai đường thẳng song song thì hai góc so le trong bằng nhau. II. PHẦN TỰ LUẬN: (7điểm) Bài 1. ( 1,5 điểm) Thực hiện phép tính: 3 1 1 3 6 : 21, 7 1, 2.5 .1 5 4 2 Bài 2.(1,5 điểm) Biết độ dài ba cạnh của một tam giác tỉ lệ với 3 ; 4 ; 5. Tính độ dài mỗi cạnh của tam giác đó, biết rằng chu vi của tam giác đó là 24cm. 0 µ 0 µ Bài 3.Cho tam gi¸c ABC cã A 70 , B 80 .Tia ph©n gi¸c trong cña gãc A c¾t BC ë D. TÝnh sè · ®o cña gãc BAD. 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