8-sinf. Testlar. I chorak. I-variant

8-sinf. Testlar. I chorak. II-variant.
1. Ifodaning qiymatini toping: а) 2,44; b)0,134; c) 23,3; d)2,24.
2. To‘g‘ri tasdiqni aniqlang: а) -5,8 va 6,3 sonlarinig kvadratlari ayirmasi 146,4 teng;
b) 144² soni 2 raqami bilan tugaydi; c)9 va –3 sonlari yig‘indisining ikkilangani shu sonlar ayirmasidan lkki marta kam; d) 27 sonining uchdan biri 100 ning 9 %iga teng.
3. х - у = 3, z = -3. bo‘lsa, ni toping. а) –1; b) –0,5; c)1; d) 0,5.
4. Bir kilogrammi n so‘mdan bo‘lgan birinchi navli choydan a kg, bir kilogrammi m so‘mdan bo‘lgan ikkhinch navli choydan b kg olindi. To‘langan pulning T formulasini tuzing.
a) T = am+bn; b)T = an + bm; c)T= anbm; d) T = an-bm.

5. 
   у = 3х + 2 formuladan х ni toping. a) х=3у – 2; b)х= +2; c)х= -2; d)
   
6. 
   Ifodani soddalashtiring: 5а – (6а – (7а – (8а - 9))). а) –2а +9 ; b) 9; c)2а – 9; d) –2а –9.
   

7. ifodadagi a qanday son qiymatlarini qabul qiladi? а) а –ixtiyoriy son;
b) 2dan boshqa barcha sonlar c)0 dan boshqa barcha sonlar; d) hech qanday
8. – 4 soni qaysi tenglamaning ildizi bo‘ladi?
а) 3(х-4) = -24; b) х+4 = 0; c)(х+1) = 1,8 (х-1); d)–х + 2 = 3(х-2)
9. Tenglamani yeching: (5х-3) + (7х-4) = 8 – (15-11х). а) ildizi yo‘q ; b)1; c)–1; d) -23.
10. Hisoblang: а) 0; b) 3,6; c)4,4 d) 4.
11. 5001,3 sonini standart ko‘rinishida yozing:
а)5,0013 ^. 10³; b)5,0013 ^. 10⁴; c)50,013 ^. 10³ ; d)0,50013 ^. 10⁴
12. Hisoblang: а) 256; b) 64; c)32; d) 2.
13. Standart ko‘rinishida yozilmagan birhadni aniqlang: а) 2abcb; b) -2m; c)- d)18a²bc.
14. Ifodani soddalashtiring: -(-х²у⁴)⁴ ∙ (6х⁴у)². а) 36х¹⁶у¹⁸; b) 36х¹²у¹¹; c)–36х¹²у¹¹; d)36х¹⁶у¹⁸ .
15. 2аа² ∙ 3b + а ∙ 8с ko‘phadni standart shaklida tasvirlang.
а) 6а³b + 8ac; b) 5a³b + 8ca; c)6aba² + 8ca; d)14a⁴bc.
16. 8b³ – 3b⁴ + 17b + 3b⁴ - 8b - 5. ko‘phadning darajasini aniqlang. а)3; b)4; c)2;d)0
17. 5а +3 и –2а² – а + 7. ko‘phadning yig‘indisini toping.
а) 2а² + 4а + 10; b) 2а² + 4а -4; c) 2а² + 4а + 4; d) -2а² - 6а + 10;
18. Ifodani soddalashtiring: 2х(х +1) – 4х(2 - х). а) –2х² + 6х; b) –2х² – 6х; c)6х² + 6х; d)6х² - 6х.
19. Qaysi funksiya chiziqli funksiya emas? а) у = 100; b)у = d) у = -х + 2.
20. у =-1,5х-5 funksiya berilgan. Agar у = 1 bo‘lsa, х ning qiymatini toping. а)-1,5; b)-4; c)-2; d)1,5.
21. у =-3х+1 to‘g‘ri chiziqning ordinata o‘qi bilan kesishgan nuqtasinig koordinatalarini toping.
а) (0; 1); b) (1; 0); c) (-1; 0); d)
22. Ordinata o‘qiga nisbatan simmetrik nuqtalar juftini toping.
а) А(5;3) va В(-5;3); b) А(1;3) va В(3;1); c) А(-1;3) va В(3;-1); d) А(0;1) va В(1;0).
23. Funksiya S(t) = -2t + 3 formula bilan berilgan bo‘lsa S(2) ni toping. а) –2; b) 2; c) 1; d) 0.
24. Tenglamalar sistemasini yeching: а) (-8;10); b) (-8;-10); c) (8;-10); d) (8;10)
25. Lola va oyisi birgalikda 110 chuchvara tayyorladilar, bunda Lola 2 soat, oyisi 3 soat ishladilar. Agar ular 1 soatda birgalikda 43 chuchvara tayyorlagan bo‘lsalar, ularnung har biri nechtadan chuchvara tayyorlaganlar ? а) 46 va 64; b) 45 va 65; c) 42 va 68; d) 38 va 72.