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de thi kiem tra giua hoc ki I toan 7

Trường THCS Thọ vực Bài thi khảo sát chất lượng giữa kì I Năm học 2009-2010  Môn toán : Lớp 7 (Thời gian làm bài 90 phút) Họ và tên......................................................................................Lớp 7................................ Số báo danh Giám thị 1 Giám thị 2 Số phách   Điểm bằng số Điểm bằng chữ Giám khảo Số phách   Bài 1( 2 điểm) : Hãy chọn đáp án đúng. Kết quả của phép tính 46.43.24 bằng : A. 413 B. 48 C. 29 D.222 Kết quả của phép tính 92:94 bằng : A. 9-2 B. 38 C.32 D.3-2 Kết quả của ; x có giá trị là : A. 3 B .  C.  và 3 Cho ba đường thẳng phân biệt a, b, c và a b, b c khi đó : c a B. a // b C. a//c Bài 2 ( 2 điểm). Các khẳng định sau đúng hay sai : Hai đường thẳng phân biệt thì luôn song song với nhau. Một đường thẳng cắt hai đường thẳng song song thì hai góc trong cùng phía bù nhau. Hai đường thẳng cắt nhau thì vuông góc với nhau. Một đường thẳng cắt hai đường thẳng song song thì hai góc trong cùng phía bù nhau. Cho diểm M nằm ngoài đường thẳng a thì chỉ có 1 dường thẳng song song với đường thẳng a Hai góc đối đỉnh thì bằng nhau. Bài 3 ( 2 điểm ): Thực hiện phép tính a.  b.  Bài 4 ( 2 điểm ) a. Tìm x biết : ( x b. Tìm x , y , z biết :  và z + y - x = 54 Bài 5 ( 2 điểm ). Cho hình vẽ, biết BO // EF, góc B = 1100, góc D = 1360. Vẽ đường thẳng xy đi qua I và song song với BO. E F Chứng minh : xy // EF. B O 1360 Tính số đo góc OIE. 1100 I ================================= Bài làm ........................................................................................................................................................................................................................................................................................................................ ......................................................................................................................................................................................................................................................................................................................... . 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