DE KIEM TRA DAI SO 7 CHUONG 1

Trường THCS Hải Thọ BÀI KIỂM TRA(Đề 2)
Lớp 7… Thời gian: 45 phút
Họ và tên:………………………………………Ngày kiểm tra:16/11/2016 Ngày trả bài:30/11/2016
Điểm:
Nhận xét của cô giáo:



Câu 1 (1 đ) Viết công thức luỹ thừa của một tích.............................................................................
Câu 2 (1 đ): a)Làm tròn các số sau đến chữ số thập phân thứ nhất: 7,923; 17,418.
................................................................................................................................................... b)Làm tròn số sau đến hàng nghìn : 413685 là : ......................................................................
Câu 3 (2 điểm) : Thực hiện phép tính :
a)
b)

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Câu 4: ( 2,5 đ) Tìm x, y biết
a)
b)
và x - y = -15 c)

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................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................Câu 5:(2,5đ).T ìm độ dài ba cạnh của tam giác, biết chu vi tam giác đó là 30m và độ dài ba cạnh tỉ lệ với các số 4; 5; 6.
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Bài 3: (1đ) Tìm a, b , c biết  =  =  và a - b = 8
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