Câu 1. x ( 2x2 + 1) =
A. 3x2 + 1 B. 2x3 + x C. 3x2 + x D. 2x3 + 1
Câu 2. (2x + y) (2x – y) =
A. 4x2 – y2 B. 4x + y C. 4x - y D. 4x2 + y2
Câu 3. Đa thức 3x-12x2y được phân tích thành
A. xy (3 - 12y) B. 3xy (1 - 4y) C. 3 ( x - 4x2y) D. 3x (1 - 4xy)
Câu 4. x3 + 3x2 + 3x + 1 =
A. (x3 + 1)3 B. x3 + 1 C. (x + 1)3 D. (x – 1)3
Câu 5. (x – 7)2 =
A. x2 –14x + 7 B. x2 – 14x + 49 C. (7 – x2)2 D. x2 – 2x + 49
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ĐỀ KIỂM TRA MÔN TOÁN - KHỐI 8
Họ tên:........................................................ Năm học: 2018 - 2019
Lớp:.............. Thời gian: 15 phút
Đề 1
Điểm
Lời phê của giáo viên
I. TRẮC NGHIỆM: ( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
Câu 1. x ( 2x2 + 1) =
A. 2x3 + 1 B. 2x3 + x C. 3x2 + 1 D. 3x2 + x
Câu 2. (2x + y) (2x – y) =
A. 4x2 – y2 B. 4x2 + y2 C. 4x - y D. 4x + y
Câu 3. Đa thức 3x-12x2y được phân tích thành
A. 3 ( x - 4x2y) B. 3xy (1 - 4y) C. 3x (1 - 4xy) D. xy (3 - 12y)
Câu 4. x3 + 3x2 + 3x + 1 =
A. x3 + 1 B. (x3 + 1)3 C. (x – 1)3 D. (x + 1)3
Câu 5. (x – 7)2 =
A. x2 –14x + 7 B. x2 – 14x + 49 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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Bài 2. ( 3 điểm ) GhÐp mçi ý ë cét A víi mçi ý ë cét B ®Ó ®îc kÕt qu¶ ®óng ?
A
B
a, x2 + 6xy + 9y2 =
1, (3x + 1)2
b, (2x - 3y)(2x +3y) =
2, (x + 3y)2
c, 9x2 - 6x +1 =
3, 4x2 - 9y2
4, ( x - 9y)2
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ĐỀ KIỂM TRA MÔN TOÁN - KHỐI 8
Họ tên:........................................................ Năm học: 2018 - 2019
Lớp:.............. Thời gian: 15 phút
Đề 2
Điểm
Lời phê của giáo viên
I. TRẮC NGHIỆM: ( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
Câu 1. x ( 2x2 + 1) =
A. 3x2 + 1 B. 2x3 + x C. 3x2 + x D. 2x3 + 1
Câu 2. (2x + y) (2x – y) =
A. 4x2 – y2 B. 4x + y C. 4x - y D. 4x2 + y2
Câu 3. Đa thức 3x-12x2y được phân tích thành
A. xy (3 - 12y) B. 3xy (1 - 4y) C. 3 ( x - 4x2y) D. 3x (1 - 4xy)
Câu 4. x3 + 3x2 + 3x + 1 =
A. (x3 + 1)3 B. x3 + 1 C. (x + 1)3 D. (x – 1)3
Câu 5. (x – 7)2 =
A. x2 –14x + 7 B. x2 – 14x + 49 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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Bài 2. ( 3 điểm ) GhÐp mçi ý ë cét A víi mçi ý ë cét B ®Ó ®îc kÕt qu¶ ®óng ?
A
B
a, x2 + 6xy + 9y2 =
1, (3x + 1)2
b, (2x - 3y)(2x +3y) =
2, (x + 3y)2
c, 9x2 - 6x +1 =
3, 4x2 - 9y2
4, ( x - 9y)2
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ĐỀ KIỂM TRA MÔN TOÁN - KHỐI 8
Họ tên:........................................................ Năm học: 2018 - 2019
Lớp:.............. Thời gian: 15 phút
Đề 3
Điểm
Lời phê của giáo viên
I. TRẮC NGHIỆM: ( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
Câu 1. x3 + 3x2 + 3x + 1 =
A. (x3 + 1)3 B. x3 + 1 C. (x + 1)3 D. (x – 1)3
Câu 2. (x – 7)2 =
A. x2 – 2x + 49 B. x2 – 14x + 49 C. (7 – x2)2 D. x2 –14x + 7
Câu 3. (2x + y) (2x – y) =
A. 4x - y B. 4x + y C. 4x2 + y2 D. 4x2 – y2
Câu 4. x ( 2x2 + 1) =
A. 2x3 + x B. 2x3 + 1 C. 3x2 + 1 D. 3x2 + x
Câu 5. Đa thức 3x-12x2y được phân tích thành
A. 3x (1 - 4xy) B. 3 ( x - 4x2y) 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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Bài 2. ( 3 điểm ) GhÐp mçi ý ë cét A víi mçi ý ë cét B ®Ó ®îc kÕt qu¶ ®óng ?
A
B
a, x2 + 6xy + 9y2 =
1, (3x + 1)2
b, (2x - 3y)(2x +3y) =
2, (x + 3y)2
c, 9x2 - 6x +1 =
3, 4x2 - 9y2
4, ( x - 9y)2
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ĐỀ KIỂM TRA MÔN TOÁN - KHỐI 8
Họ tên:........................................................ Năm học: 2018 - 2019
Lớp:.............. Thời gian: 15 phút
Đề 4
Điểm
Lời phê của giáo viên
I. TRẮC NGHIỆM: ( 5 điểm ) Khoanh tròn chữ cái trước câu trả lời đúng.
Câu 1. Đa thức 3x-12x2y được phân tích thành
A. 3 ( x - 4x2y) B. xy (3 - 12y) C. 3x (1 - 4xy) D. 3xy (1 - 4y)
Câu 2. x3 + 3x2 + 3x + 1 =
A. (x – 1)3 B. (x + 1)3 C. (x3 + 1)3 D. x3 + 1
Câu 3. x ( 2x2 + 1) =
A. 2x3 + 1 B. 3x2 + x C. 3x2 + 1 D. 2x3 + x
Câu 4. (2x + y) (2x – y) =
A. 4x2 – y2 B. 4x + y C. 4x - y D. 4x2 + y2
Câu 5. (x – 7)2 =
A. x2 – 2x + 49 B. x2 –14x + 7 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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Bài 2. ( 3 điểm ) GhÐp mçi ý ë cét A víi mçi ý ë cét B ®Ó ®îc kÕt qu¶ ®óng ?
A
B
a, x2 + 6xy + 9y2 =
1, (3x + 1)2
b, (2x - 3y)(2x +3y) =
2, (x + 3y)2
c, 9x2 - 6x +1 =
3, 4x2 - 9y2
4, ( x - 9y)2
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Đề 1
Đề 2
Đề 3
Đề 4
1. B
1. B
1. C
1. C
2. A
2. A
2. B
2. B
3. C
3. D
3. D
3. D
4. D
4. C
4. A
4. A
5. B
5. B
5. A
5. C
Đề1
B
A
C
D
B
Đề2
B
A
D
C
B
Đề3
C
B
D
A
A
Đề4
C
B
D
A
C
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