DE KIEM TRA DAI SO 7 CHUONG 1

Trường THCS Hải Thọ BÀI KIỂM TRA(Đề 1)
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 thương..........................................................................
Câu 2 (1 đ): a)Làm tròn các số sau đến chữ số thập phân thứ hai: 7,955; 17,439.
................................................................................................................................................... b)Làm tròn số sau đến hàng chục: 413685 là : .....................................................................
Câu 3 (2 điểm) : Thực hiện phép tính
b)

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

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Câu 5:(2,5đ) Ba lớp 7A,7B, 7C trồng được 180 cây. Tính số cây trồng được của mỗi lớp biết rằng số cây trồng được của ba lớp lần lượt tỉ lệ với 5:6:7 .
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Bài 3: (1đ) Tìm x , y, z biết :
và x – z = 20
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