Đề kiểm tra 1 tiết Toán 7

Họ và tên: .............................................. Lớp: ............Trường: ............................................
KIỂM TRA 1 TIẾT
1.Thực hiện phép tính: (2,5 điểm) a)

b)

c)
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2.Tìm x: (1,5 điểm)
a)

b)
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3.Thời gian của ô tô, xe đạp, xe máy chạy trên cùng một quãng đường lần lượt là 3 giờ, 6 giờ, 4 giờ. Tính quãng đường này dài bao nhiêu km, biết cả 3 phương tiện này xuất phát cùng nhau và vận tốc của xe máy ít hơn vận tốc của ô tô 15 km/h. (1,5 điểm)
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4.Cho hàm số y = f(x) = | x2 + 1 | – 3: (1,5 điểm) a) Tính f(2), f(-3).
b) Tìm x biết f(x) = 14.
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5.Cho ∆ABC có AB < AC. Trên AC cho I để AB = AI. Tia phân giác A cắt BC tại D. (3 điểm)
a) Chứng minh DB = DI.
b) AB, DI cắt nhau tại M. Chứng minh BMD = ICD.
c) Gọi N là trung điểm của MC. Chứng minh A, D, N thẳng hàng.
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6*.Có bao nhiêu cách chứng minh 3 điểm thẳng hàng? Kể tên. (+1 điểm)
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