kiem tra 15
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Họ tên:........................................................
Lớp:..............
Đề 1
Điểm
ĐỀ KIỂM TRA MƠN TỐN - KHỐI 8
Năm học: 2018 - 2019
Thời gian: 15 phút
Lời phê của giáo viên
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I. TRẮC NGHIỆM:
( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
2
Câu 1. x ( 2x + 1) =
A. 2x3 + 1
B. 2x3 + x
Câu 2. (2x + y) (2x – y) =
A. 4x2 – y2
B. 4x2 + y2
2
Câu 3. Đa thức 3x-12x y được phân tích thành
A. 3 ( x - 4x2y)
B. 3xy (1 - 4y)
3
2
Câu 4. x + 3x + 3x + 1 =
A. x3 + 1
B. (x3 + 1)3
Câu 5. (x – 7)2 =
A. x2 –14x + 7
B. x2 – 14x + 49
C. 3x2 + 1
D. 3x2 + x
C. 4x - y
D. 4x + y
C. 3x (1 - 4xy)
D. xy (3 - 12y)
C. (x – 1)3
D. (x + 1)3
C. (7 – x2)2
D. x2 – 2x + 49
II. TỰ LUẬN (5 điểm)
Bài 1. ( 2 điểm ) Tính giá trị của biểu thức :
y2 + 4y + 4
tại y = 98
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Bi 2. ( 3 im ) Ghép mỗi ý ở cột A với mỗi ý ở cột B để đợc kết quả đúng ?
A
a, x + 6xy + 9y =
b, (2x - 3y)(2x +3y) =
c, 9x2 - 6x +1 =
2
2
B
1, (3x + 1)
2, (x + 3y)2
3, 4x2 - 9y2
4, ( x - 9y)2
2
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Họ tên:........................................................
Lớp:..............
Đề 2
Điểm
ĐỀ KIỂM TRA MƠN TỐN - KHỐI 8
Năm học: 2018 - 2019
Thời gian: 15 phút
Lời phê của giáo viên
……………………………………………………………………………………
……………………………………………………………………………………
I. TRẮC NGHIỆM:
( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
2
Câu 1. x ( 2x + 1) =
A. 3x2 + 1
B. 2x3 + x
Câu 2. (2x + y) (2x – y) =
A. 4x2 – y2
B. 4x + y
2
Câu 3. Đa thức 3x-12x y được phân tích thành
A. xy (3 - 12y)
B. 3xy (1 - 4y)
Câu 4. x3 + 3x2 + 3x + 1 =
A. (x3 + 1)3
B. x3 + 1
2
Câu 5. (x – 7) =
A. x2 –14x + 7
B. x2 – 14x + 49
C. 3x2 + x
D. 2x3 + 1
C. 4x - y
D. 4x2 + y2
C. 3 ( x - 4x2y)
D. 3x (1 - 4xy)
C. (x + 1)3
D. (x – 1)3
C. (7 – x2)2
D. x2 – 2x + 49
II. TỰ LUẬN (5 điểm)
Bài 1. ( 2 điểm ) Tính giá trị của biểu thức :
y2 + 4y + 4
tại y = 98
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Bi 2. ( 3 im ) Ghép mỗi ý ở cột A với mỗi ý ở cột B để đợc kết quả đúng ?
A
a, x2 + 6xy + 9y2 =
b, (2x - 3y)(2x +3y) =
c, 9x2 - 6x +1 =
B
1, (3x + 1)2
2, (x + 3y)2
3, 4x2 - 9y2
4, ( x - 9y)2
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Họ tên:........................................................
Lớp:..............
Đề 3
Điểm
ĐỀ KIỂM TRA MƠN TỐN - KHỐI 8
Năm học: 2018 - 2019
Thời gian: 15 phút
Lời phê của giáo viên
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I. TRẮC NGHIỆM:
3
( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
2
Câu 1. x + 3x + 3x + 1 =
A. (x3 + 1)3
B. x3 + 1
Câu 2. (x – 7)2 =
A. x2 – 2x + 49
B. x2 – 14x + 49
Câu 3. (2x + y) (2x – y) =
A. 4x - y
B. 4x + y
Câu 4. x ( 2x2 + 1) =
A. 2x3 + x
B. 2x3 + 1
2
Câu 5. Đa thức 3x-12x y được phân tích thành
A. 3x (1 - 4xy)
B. 3 ( x - 4x2y)
C. (x + 1)3
D. (x – 1)3
C. (7 – x2)2
D. x2 –14x + 7
C. 4x2 + y2
D. 4x2 – y2
C. 3x2 + 1
D. 3x2 + x
C. 3xy (1 - 4y)
D. xy (3 - 12y)
II. TỰ LUẬN (5 điểm)
Bài 1. ( 2 điểm ) Tính giá trị của biểu thức :
y2 + 4y + 4
tại y = 98
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Bi 2. ( 3 im ) Ghép mỗi ý ở cột A với mỗi ý ở cột B để đợc kết quả đúng ?
A
a, x2 + 6xy + 9y2 =
b, (2x - 3y)(2x +3y) =
c, 9x2 - 6x +1 =
B
1, (3x + 1)2
2, (x + 3y)2
3, 4x2 - 9y2
4, ( x - 9y)2
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Họ tên:........................................................
Lớp:..............
Đề 4
Điểm
ĐỀ KIỂM TRA MƠN TỐN - KHỐI 8
Năm học: 2018 - 2019
Thời gian: 15 phút
Lời phê của giáo viên
……………………………………………………………………………………
……………………………………………………………………………………
I. TRẮC NGHIỆM:
( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
2
Câu 1. Đa thức 3x-12x y được phân tích thành
A. 3 ( x - 4x2y)
B. xy (3 - 12y)
Câu 2. x3 + 3x2 + 3x + 1 =
A. (x – 1)3
B. (x + 1)3
Câu 3. x ( 2x2 + 1) =
A. 2x3 + 1
B. 3x2 + x
Câu 4. (2x + y) (2x – y) =
A. 4x2 – y2
B. 4x + y
2
Câu 5. (x – 7) =
A. x2 – 2x + 49
B. x2 –14x + 7
C. 3x (1 - 4xy)
D. 3xy (1 - 4y)
C. (x3 + 1)3
D. x3 + 1
C. 3x2 + 1
D. 2x3 + x
C. 4x - y
D. 4x2 + y2
C. x2 – 14x + 49
D. (7 – x2)2
II. TỰ LUẬN (5 điểm)
Bài 1. ( 2 điểm ) Tính giá trị của biểu thức :
y2 + 4y + 4
tại y = 98
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Bi 2. ( 3 im ) Ghép mỗi ý ở cột A với mỗi ý ở cột B để đợc kết quả đúng ?
A
a, x2 + 6xy + 9y2 =
b, (2x - 3y)(2x +3y) =
c, 9x2 - 6x +1 =
B
1, (3x + 1)2
2, (x + 3y)2
3, 4x2 - 9y2
4, ( x - 9y)2
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Đề 1
1. B
2. A
3. C
4. D
5. B
Đề1
Đề2
Đề3
Đề4
Đề 2
1. B
2. A
3. D
4. C
5. B
B
B
C
C
A
A
B
B
Đề 3
1. C
2. B
3. D
4. A
5. A
Đề 4
1. C
2. B
3. D
4. A
5. C
C
D
D
D
B
B
A
C
D
C
A
A
