KIỂM TRA CHƯƠNG II ĐS7 ( tự luận 2 đề)
Chia sẻ bởi Mai Ngọc Lợi |
Ngày 12/10/2018 |
53
Chia sẻ tài liệu: KIỂM TRA CHƯƠNG II ĐS7 ( tự luận 2 đề) thuộc Đại số 7
Nội dung tài liệu:
Trường THCS BÀI KIỂM TRA CHƯƠNG II ĐAI SỐ-LỚP 7 ĐỀ CHẴN
Ba Đồn Thời gian 45 phút
Họ tên học sinh:.....................................................................Lớp 7......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
…………………………………………………………………………
…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1: ( 3 đ) ) Cho x và y là hai đại lượng tỉ lệ thuận với nhau và khi x = 3 thì y = -7
Tìm hệ số tỉ lệ k của y đối với x;
Biểu diễn y theo x.
Tính giá trị của y khi x = -9, x = 18.
Câu 2: ( 3 đ) Ba đội máy cày làm ba khối lượng công việc như nhau. Đội 1 hoàn thành công việc trong 4 ngày, đội 2 hoàn thành công việc trong 6 ngày,đội 3 hoàn thành công việc trong 8 ngày. Hỏi mỗi đội có bao nhiêu máy (các máy có cùng năng suất) Biết rằng đội 1 nhiều hơn đội 2 là 2 máy
Câu 3: (4đ) Cho hàm số y= f(x) =
Tính f(2013), f(-2016)
Tìm các giá trị của x để y nhận giá trị dương, giá trị âm, y = 0.
Vẽ đồ thị hàm số trên.
Bài làm
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Trường THCS BÀI KIỂM TRA CHƯƠNG II ĐAI SỐ-LỚP 7 ĐỀ LẼ
Ba Đồn Thời gian 45 phút
Họ tên học sinh:.....................................................................Lớp 7......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
…………………………………………………………………………
…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1: ( 3 đ) ) Cho x và y là hai đại lượng tỉ lệ thuận với nhau và khi x = 5 thì y = -7
a) Tìm hệ số tỉ lệ k của y đối với x;
b) Biểu diễn y theo x.
c) Tính giá trị của y khi x = -10, x = 25.
Câu 2: ( 3 đ) ) Ba đội máy cày làm ba khối lượng công việc như nhau. Đội 1 hoàn thành công việc trong 4 ngày, đội 2 hoàn thành công việc trong 6 ngày,đội 3 hoàn thành công việc trong 8 ngày. Hỏi mỗi đội có bao nhiêu máy (các máy có cùng năng suất) Biết rằng đội 1 nhiều hơn đội 2 là 4 máy
Câu 3: (4đ) Cho hàm số y= f(x) = -
Tính f(2012), f(-2014)
b) Tìm các giá trị của x để y nhận giá trị dương, giá trị âm, y = 0.
c) Vẽ đồ thị hàm số trên.
Bài làm
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ĐÁP ÁN ĐỀ KIỂM TRA ĐẠI SỐ CHƯƠNG II NĂM HỌC 2011-2012
ĐỀ CHẴN
CÂU
ĐÁP ÁN
ĐIỂM
Câu 1
(3 điểm )
a) x và y là hai đại lượng tỉ lệ thuần suy ra
b)
c) x=-9 =21
x= 18 = - 42
1 đ
0.5đ
0.5đ
0.5đ
Câu 2:
(3 điểm)
- gọi số máy ba đội lần lượt là: x1, x2, x3,
Ta có: x1 - x2 =2
Vì số máy tỉ lệ nghich với số ngày hoàn thành công việc ta có :
4x1 = 6 x2 = 8x3
Hay:
Áp dụng tính chất của dãy tỉ số bằng nhau
=
Ba Đồn Thời gian 45 phút
Họ tên học sinh:.....................................................................Lớp 7......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
…………………………………………………………………………
…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1: ( 3 đ) ) Cho x và y là hai đại lượng tỉ lệ thuận với nhau và khi x = 3 thì y = -7
Tìm hệ số tỉ lệ k của y đối với x;
Biểu diễn y theo x.
Tính giá trị của y khi x = -9, x = 18.
Câu 2: ( 3 đ) Ba đội máy cày làm ba khối lượng công việc như nhau. Đội 1 hoàn thành công việc trong 4 ngày, đội 2 hoàn thành công việc trong 6 ngày,đội 3 hoàn thành công việc trong 8 ngày. Hỏi mỗi đội có bao nhiêu máy (các máy có cùng năng suất) Biết rằng đội 1 nhiều hơn đội 2 là 2 máy
Câu 3: (4đ) Cho hàm số y= f(x) =
Tính f(2013), f(-2016)
Tìm các giá trị của x để y nhận giá trị dương, giá trị âm, y = 0.
Vẽ đồ thị hàm số trên.
Bài làm
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Trường THCS BÀI KIỂM TRA CHƯƠNG II ĐAI SỐ-LỚP 7 ĐỀ LẼ
Ba Đồn Thời gian 45 phút
Họ tên học sinh:.....................................................................Lớp 7......
Điểm
Lời phê của thầy, cô giáo
…………………………………………………………………………
…………………………………………………………………………
…………………………………………………………………………
Bằng số
Bằng chữ
Chữ ký:
Đề bài:
Câu 1: ( 3 đ) ) Cho x và y là hai đại lượng tỉ lệ thuận với nhau và khi x = 5 thì y = -7
a) Tìm hệ số tỉ lệ k của y đối với x;
b) Biểu diễn y theo x.
c) Tính giá trị của y khi x = -10, x = 25.
Câu 2: ( 3 đ) ) Ba đội máy cày làm ba khối lượng công việc như nhau. Đội 1 hoàn thành công việc trong 4 ngày, đội 2 hoàn thành công việc trong 6 ngày,đội 3 hoàn thành công việc trong 8 ngày. Hỏi mỗi đội có bao nhiêu máy (các máy có cùng năng suất) Biết rằng đội 1 nhiều hơn đội 2 là 4 máy
Câu 3: (4đ) Cho hàm số y= f(x) = -
Tính f(2012), f(-2014)
b) Tìm các giá trị của x để y nhận giá trị dương, giá trị âm, y = 0.
c) Vẽ đồ thị hàm số trên.
Bài làm
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ĐÁP ÁN ĐỀ KIỂM TRA ĐẠI SỐ CHƯƠNG II NĂM HỌC 2011-2012
ĐỀ CHẴN
CÂU
ĐÁP ÁN
ĐIỂM
Câu 1
(3 điểm )
a) x và y là hai đại lượng tỉ lệ thuần suy ra
b)
c) x=-9 =21
x= 18 = - 42
1 đ
0.5đ
0.5đ
0.5đ
Câu 2:
(3 điểm)
- gọi số máy ba đội lần lượt là: x1, x2, x3,
Ta có: x1 - x2 =2
Vì số máy tỉ lệ nghich với số ngày hoàn thành công việc ta có :
4x1 = 6 x2 = 8x3
Hay:
Áp dụng tính chất của dãy tỉ số bằng nhau
=
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