Trường THCS Thái Tân Kiểm tra 15 phút – Môn: Toán 6 Họ tên:............................................. Ngày: ...................... Lớp: ......... Điểm Lời phê của thầy (cô) giáo Đề bài Phần 1. Trắc nghiệm (3.0 điểm) Khoanh vào phương án đúng cho các câu sau: Câu 1. Cho tập hợp A = {1; 2; 3; 4}. Kí hiệu nào sau đây là đúng? a, 1 Ï A b, 2 Î A c, {1; 2} Î A d, 5 Ì A Câu 2. Điều kiện để xảy ra phép trừ sau a – b là: a, a b c, a = b d, a ≥ b Câu 3. Giá trị của 32 bằng: a, 9 b, 6 c, 4 d, 8 Phần 2. Tự luận (7,0 điểm) Câu 1(5 diểm) Thực hiện tính bằng cách hợp lí nhất a. 123 + 45 + 77 b. 172. 25 – 72 . 25 c. 23. 65 + 23 . 35 – 100 Câu 2 (2 điểm) Tìm số tự nhiên x biết a. x – 205 = 0 b. (2x – 1)2 = 9 Bài làm .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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