Kiểm tra 1 tiết
Chia sẻ bởi Lê Thương Huyền |
Ngày 29/10/2018 |
38
Chia sẻ tài liệu: Kiểm tra 1 tiết thuộc Đại số 8
Nội dung tài liệu:
Họ và Tên : . . . . . . . . . . . . . . . . . . . KIỂM TRA I TIẾT ( BÀI SỐ 1)
Lớp 8A MÔN: ĐẠI SỐ 8
Điểm
Lời phê của thầy cô giáo
ĐỀ BÀI 1
Bài 1: Làm tính nhân:
a) 2x3. (x2 – 7x -3) b) ( -2x3 + y2 -7xy). 4x3y2
c) ( 16x2 + 12xy + 9y2). ( 4x – 3y) d) ( 5x3 – x2 + 2x – 3). ( 4x2 – x + 2)
Bài 2 :Tính nhanh:
a) 20152 - 225; b) 8922 + 892 . 216 + 1082
c) 10,2 . 9,8 – 9,8 . 0,2 + 10,22 –10,2 . 0,2 d) 462 + 262 – 52 . 46
Câu 3: Phân tích các đa thức sau thành nhân tử:
a) 4x - 12y
b) x2 +2xy + y2- 36
c) 4x2 + 5x - 4xy- 5y
d) x2 – 2x – 15
Câu 4: Tìm a, để đa thức (6x3 - 7x2 - x + a) (2x + 1)
Câu 6 : Tìm x biết
1/ 2/ 7x( x - 7 ) - x+7 = 0
3/ 3x( x - 5 ) - ( x - 1 )( 2 +3x ) = 30 4/ (x+2)(x+3) - (x-2)(x+5) = 0
Câu 7: Tìm giá trị nhỏ nhất của biểu thức: A = x2 - 2x + 5
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Họ và Tên : . . . . . . . . . . . . . . . . . . . KIỂM TRA I TIẾT ( BÀI SỐ 1)
Lớp 8A MÔN: ĐẠI SỐ 8
Điểm
Lời phê của thầy cô giáo
ĐỀ BÀI 2
Bài 1: Làm tính nhân:
a) 2x. (3x2 – 7x +3) b) ( 2x3 - y2 +7x2y). 4xy3
c) ( 25x2 - 10xy + 4y2). ( 5x + 2y) d) ( 5x3 + x2 - 2x + 3). ( 4x2 + x - 2)
Bài 2 :Tính nhanh:
a) 20062 - 36; b) 8922 + 892 . 216 + 1082
c) 10,2 . 9,8 – 9,8 . 0,2 + 10,22 –10,2 . 0,2 d) 362 + 262 – 52 . 36
Câu 3: Phân tích các đa thức sau thành nhân tử:
a) 16x - 8y
b) x2 - 2xy + y2-16
c) 3x2 - 5x - 3xy+ 5y
d) 2x2 –x – 3
Câu 4: Tìm a, để đa thức (6x3 - 7x2 - 2x + 3 - a) (2x - 1)
Câu 6 : Tìm x biết
1/ x( x-2 ) + x - 2 = 0 2/ 5x( x-3 ) - x+3 = 0
3/ 4/ (x+2)(x+3) - (x-2)(x+5) = 0
Câu 7: Tìm giá trị nhỏ nhất của biểu thức: A = x2 - 4x + 2
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Lớp 8A MÔN: ĐẠI SỐ 8
Điểm
Lời phê của thầy cô giáo
ĐỀ BÀI 1
Bài 1: Làm tính nhân:
a) 2x3. (x2 – 7x -3) b) ( -2x3 + y2 -7xy). 4x3y2
c) ( 16x2 + 12xy + 9y2). ( 4x – 3y) d) ( 5x3 – x2 + 2x – 3). ( 4x2 – x + 2)
Bài 2 :Tính nhanh:
a) 20152 - 225; b) 8922 + 892 . 216 + 1082
c) 10,2 . 9,8 – 9,8 . 0,2 + 10,22 –10,2 . 0,2 d) 462 + 262 – 52 . 46
Câu 3: Phân tích các đa thức sau thành nhân tử:
a) 4x - 12y
b) x2 +2xy + y2- 36
c) 4x2 + 5x - 4xy- 5y
d) x2 – 2x – 15
Câu 4: Tìm a, để đa thức (6x3 - 7x2 - x + a) (2x + 1)
Câu 6 : Tìm x biết
1/ 2/ 7x( x - 7 ) - x+7 = 0
3/ 3x( x - 5 ) - ( x - 1 )( 2 +3x ) = 30 4/ (x+2)(x+3) - (x-2)(x+5) = 0
Câu 7: Tìm giá trị nhỏ nhất của biểu thức: A = x2 - 2x + 5
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Họ và Tên : . . . . . . . . . . . . . . . . . . . KIỂM TRA I TIẾT ( BÀI SỐ 1)
Lớp 8A MÔN: ĐẠI SỐ 8
Điểm
Lời phê của thầy cô giáo
ĐỀ BÀI 2
Bài 1: Làm tính nhân:
a) 2x. (3x2 – 7x +3) b) ( 2x3 - y2 +7x2y). 4xy3
c) ( 25x2 - 10xy + 4y2). ( 5x + 2y) d) ( 5x3 + x2 - 2x + 3). ( 4x2 + x - 2)
Bài 2 :Tính nhanh:
a) 20062 - 36; b) 8922 + 892 . 216 + 1082
c) 10,2 . 9,8 – 9,8 . 0,2 + 10,22 –10,2 . 0,2 d) 362 + 262 – 52 . 36
Câu 3: Phân tích các đa thức sau thành nhân tử:
a) 16x - 8y
b) x2 - 2xy + y2-16
c) 3x2 - 5x - 3xy+ 5y
d) 2x2 –x – 3
Câu 4: Tìm a, để đa thức (6x3 - 7x2 - 2x + 3 - a) (2x - 1)
Câu 6 : Tìm x biết
1/ x( x-2 ) + x - 2 = 0 2/ 5x( x-3 ) - x+3 = 0
3/ 4/ (x+2)(x+3) - (x-2)(x+5) = 0
Câu 7: Tìm giá trị nhỏ nhất của biểu thức: A = x2 - 4x + 2
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