Matematika 7-sinf 2-вариант Ifoganing qiymatini toping, agar Х =

Matematika 7-sinf 2-вариант

1. Ifoganing qiymatini toping , agar х =



2.Kasrning qiymatini toping , agar х =

3. 
   Ifodani soddalashting va qiymatini mtoping 0,19n - 0,87n – 0,91n + 0,87n agar n = - 1,5 bo’lsa.
   

A. 10,8 B. 108 V. 1,08 G. 0,108.

3. 
   Qovuslarni oching va soddalshtiring
   

3. 
   Tenglamalarni yeching -8,9 – (3,7 – x) = -13,6.
   

A.–0,1 B. 0,1 V. 1 G. -1

3. 
   Amallarni bajaring
   

A. 27 B. 3 V. 1 D. 9.

7. Birhadni standart ko’rinishga keltiring: (0,4x³ y)(-1,6ху²).

A. 6,4х³у³ B. -6,4х⁴у³ V.6,4х³у⁴ G. –6,4х³у³.

8. Ko’pgadni standart ko’rinishga keltiring:

3xy - 0,2x² – 5xy - 0,8x² – 4xy.

A. x² – 6xy B. -x² – 6xy V. 0,1x² – xy G. -0,1x² - xy.

9. Ko’phadlar bilan amallarni bajaring (6m + 2m² n – 5n²) + (9m² – 4m² n – 8n²).

A. 3m² – 2m² n –13n² B. 15m² – 2m² n – 13n² V. 15m² + 2m² n + 13n²;

G. -15m² – 2m² n – 13n².

10. Qovuslarni oching va soddalashtiring: (a - 1)∙ 2a – (a + 5) ∙ 3a.

A. -a² – 17a B. 5a² – 13a V. a² – 17a G. 5a² + 13a.

11. 
    Bo’lishni bajaring: (3a⁴b⁴ + 2a⁴ b³ – 3a³b²) : (-a³ b²).
    

A. 3ab – 2a + 3 B. –3ab² – 2a + 3 V. –3ab + 2a – 3b G.-3ab – 2a + 3.

11. 
    Gruppalash usuli bilan ko’paytuvchilarga ajrating.
    

2а – 2b + ca – cb.

A. (a + b)(2 + c) B. (a - b)(2 - c) V. (a + b)(2 - c) G. (a - b)(2 + c).

11. 
    Ko’paytuvchilarga ajrating.-4а² – 8аb – 4b².
    

A. 4(а - b)² B. (а – 2b)² V. –4(a - b)² G. -4(a + b)².

11. 
    Ko’paytuvchilarga ajrating: 81a⁴ – 1.
    

A. (9a + 1)(9a - 1) B. (3a² + 1)(3a² - 1) V (9a² + 1)(9a² - 1)

G. (a² + 1)(a² - 1)

11. 
    Tenglamani yeching: 2(0,6х + 1,85) – 0,7 = 1,3х .
    

A. х = 3 B. х = 30 V. х = 0,3 G. х = - 30.

16. Kasrlarni qisqartiring:


17. Amallarni bajaring:



18. Amallarni bajaring:

A. 0 B. 2 V. 1 G. 4.

19. Qo’shni burchaklardan biri ikkinchisidan 80⁰ katta.

A. 40⁰; 140⁰ B. 50⁰; 130⁰ V. 60⁰; 120⁰ . G. 70⁰; 110⁰.

20. Ikki to’gri chiziqning kesishishidan 103⁰ ga teng burchak hosil bo’ldi.Barcha hosil bo’lgan burchaklarni toping.

A. 93⁰; 87⁰ ; 87⁰ B. 103⁰; 77⁰; 77⁰ V. 97⁰; 97⁰ ;83⁰ G. 73⁰; 107⁰; 107⁰.

21. Teng yonli uchburchakning perimetri 3,4 dm, asosi 0,8 dm. Yon tomonlarni toping.

A. 1,3 dm B. 1,1 dm V.13 dm D. 0,13 dm.

22. Uchburchakning burchaklarini nisbati 7:4:1 ga teng. Uchburchakning burchaklarini topng.

A. 105⁰; 50⁰; 25⁰ B. 95⁰; 70⁰; 15⁰ V.105⁰; 60⁰; 15⁰ G. 110⁰; 50⁰; 20⁰.

23. 
    АВС teng yonli uchburchakning (АВ = ВС) tashqi burchagi ВСК 110⁰ ga teng. АВС burchakni toping.
    

A. 50⁰ B. 40⁰ V. 60⁰ G. 30⁰.

23. 
    Ikki to’gri chiziq uchinchi to'g’ri chiziq bilan kesishganda burchaklardan biri ikkinchisidan 32⁰ ga katta. Bu burchaklarni toping.
    

A. 72⁰ и 108⁰ B. 62⁰ и 118⁰ V. 82⁰ и 98⁰ G. 74⁰ и 106⁰.

23. 
    АВС va ДЕF uchburchaklar teng. ДЕF uchburchaklar burchaklari teng: D = 85⁰; E = 50⁰; F = 45⁰. ABC uchburchakni burchaklarini toping.
    

A. A = 85⁰; B = 50⁰; C = 45⁰ B. A = 45⁰; B = 50⁰; C = 85⁰

V. A= 50⁰; B = 85⁰; C = 45⁰ G. A = 85⁰; B = 45⁰; C = 50⁰ .