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Đề kiểm tra 1 tiết Đại số lớp 7

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Mời các bạn cùng tham khảo đề thi để phục vụ công tác dạy và học môn Đại số lớp 7. Đây còn là tài liệu tham khảo hữu ích dành cho giáo viên trong quá trình tiến hành biên soạn đề thi, các bài kiểm tra năng lực của học sinh.

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Nội dung Text: Đề kiểm tra 1 tiết Đại số lớp 7

  1. TRƯỜNG THCS THỊ TRẤN ĐU BÀI KIỂM TRA ĐIỂM Họ và tên: ................................................................ Môn: Đại số 7 Lớp: 7…… (Thời gian làm bài: 45 phút) ĐỀ BÀI Câu 1 (3 điểm): Thực hiện phép tính:  Câu 2 (2,5 điểm): Tìm x biết:  Câu 3 (1,5 điểm): Tính giá trị của biểu thức:  Câu 4 (2 điểm): Hưởng  ứng phong trào “Nuôi lợn nhựa tiết kiệm”, cuối học kì I,  bốn chi đội 7A, 7B, 7C, 7D thu được tổng số  tiền là 780 nghìn đồng. Biết rằng số  tiền của bốn chi đội lần lượt tỉ lệ với 8, 6, 7, 5. Hãy tính số  tiền mà mỗi chi đội thu  được? Câu 5 (1 điểm): So sánh: và  BÀI LÀM ............................................................................................................................................................................................................................................. ............................................................................................................................................................................................................................................. ............................................................................................................................................................................................................................................. ............................................................................................................................................................................................................................................. 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  3. ............................................................................................................................................................................................................................................. Đáp án Điểm Câu 1đ 1đ 1 1đ hoặc hoặc 0,75đ (ĐK: ) (thỏa mãn) 1đ Vậy x = 6 2 0,75đ 3 1,5đ
  4. Gọi số tiền mà các chi đội 7A, 7B, 7C, 7D thu được lần lượt là x, y, z, t (nghìn đồng) (0 < x, y, z, t < 780) Vì bốn chi đội 7A, 7B, 7C, 7D đã thu được tổng cộng 780 nghìn đồng nên ta có: x + y + z + t = 780 (1) Vì số tiền thu được của bốn chi đội lần lượt tỉ lệ với 8, 6, 7, 5 nên ta 4 có: 2đ (theo (1)) Từ đó, ta tính được: x = 240; y = 180; z = 210; t = 150 (thỏa mãn) Vậy lớp 7A thu được 240 nghìn đồng, lớp 7B thu được 180 nghìn đồng, lớp 7C thu được 210 nghìn đồng, lớp 7A thu được 150 nghìn đồng. Ta có: ; Mà 27 > 25 > 0 nên Vậy 5 1đ
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