Kiểm tra 15 phut đai so 8

và tên :…………………………………………..
: 8.
ĐỀ KIỂM TRA
Môn đại số :(Thời gian :15 phút)

Điểm
xét của giáo viên






Đề bài:
Câu 1(4 điểm): Viết những hằng đẳng thức đáng nhớ?
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Câu 2 (4 điểm): Phân tích các đa thức sau thành nhân tử.
a/ x2 – 4 = …………………………………………………………………………………………..…………………………………………………
.…………………… …………………………………………………………………………………………………………………………………………
b/ x2 +10x + 25 = ……………………………………………………………………………………………..………………………
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c/ x3 + 3x2 +3x + 1 = ……………………………………………………………………………………………………………………
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d/ 8x3 – y3 = …………………….……………….………………………...………………………………………………………
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Câu 3 (2 điểm) : Tính nhanh:
;
a/ 682 – 322 = ………………………………………………………………………………………….…………………………………
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b/ 652 + 130 . 45 + 452 = …………………………………………………………………………………………………………………
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Trường THCS……. KIỂM TRA ĐẠI SỐ 8 (15 phút)
Họ và tên:…………………… Ngày kiểm tra: /10/2010
Lớp : 8A....

Điểm
Lời phê của thầy, cô giáo







Đề bài:

Bài 1:(4.5điểm) Viết dưới dạng tích.
a/ x2 – 16; b/ x2 + 10x + 25; c/ d/ 8x3 + y3 ;
Bài 2: (3điểm) Tính.
a/ (3 - y)2 ; b/ (2x + y)3; c/ (x + y).( x2 - xy + y2)
Bài 3: (2.5 điểm) Tính nhanh.
a/ 652 – 352; b/ 832 + 602 – 172 – 402 ;
Bài làm
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Trường THCS … KIỂM TRA ĐẠI SỐ 8 (15 phút)
Lớp : 8A.... Ngày kiểm tra: /10/2009
Điểm
Lời phê của thầy, cô giáo







Đề II:
Bài 1: (2.5 điểm) Tính nhanh.
a/ 452 – 52; b/ 802 + 692 – 202 – 312 ;
Bài 2: (4.5 điểm) Viết dưới dạng tích.
a/ a2 – 4; b/ 9- 6a + a2; c / a3 – 8b3 ;
Bài 3: (3điểm) Tính.
a/ (a – 3)2 ; b/ (a + 2b)3; c/ (a – b).( a2 + ab + b2) ;
Bài làm
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