Kiểm tra đại số 15 Bài số 3- Tuần 15 Lớp 8

KiÓm tra ®¹i sè 15’
Bµi sè 3- TuÇn 15

Hä vµ tªn :………………
Líp: 8
 Ngµy kiÓm tra :
 Ngµy tr¶ bµi: 



Lêi phª cña c« gi¸o 
§iÓm 





I. Tràõc nghiãûm: ( 4 âiãøm )
Khoanh trßn vµo c©u tr¶ lêi ®óng trong c¸c c©u tõ 1 ®Õn 9 :(mçi c©u 0,5®)
1/ Ph©n thøc rót gän thµnh 
A.	B. 	C. 	D. 
2/ Ph©n thøc rót gän thµnh 
A.	B.- x	C. 	D. 
3/ Ph©n thøc rót gän thµnh 
A.	B. 	C. 	D. 
4/ MÉu thøc chung cña hai ph©n thøc vµ lµ :
 A.x2 – y2 	B.y2 – x2 	C. ( x+ y)2 	D. (y – x)2 
5/ MÉu thøc chung cña hai ph©n thøc vµ lµ :
 A.-10x2 y3 z4 	B.50x3 y3 z4	C. 10x2 y3 z4	D. -50x3 y3 z4
6/ Thùc hiÖn phÐp to¸n Ta ®­îc
A. 	B.- 1	C. 	D. 0
7/ Ph©n thøc ®èi cña ph©n thøc lµ :
A. 	B. 	C. 	D. 
8/ Ph©n thøc ®èi cña ph©n thøc lµ :
A. 	B. 	C. 	D. 
II. Tæû luáûn: ( 6 âiãøm )
1. Ruït goün: ( 2 âiãøm )
a. b. 
2. Quy âäöng máùu 2 phán thæïc: ( 1 âiãøm )
3. Tênh:( 3 âiãøm )
a. b. 
BAÌI LAÌM:
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