Matematika

Matematika. 7 sinf. Test savollari. III-chorak
II- variant.

1. Tog`ri to`rtburchakning eni 8 sm ga teng, bo`yi undan 2 sm ga ortiq bo`lsa, uning perimetrini toping.

A) 24 sm B) 28 sm C) 36 sm D) 20 sm
2. Uchburchakning tomonlari 7 sm, 11 sm, 8 sm ga teng. Uchlari shu uchburchak tomonlarining o`rtalarida yotgan uchburchak perimetrini toping.
A) 13 sm B) 16 sm C) 22 sm D) 26 sm
3. To`rtburchak 3 ta burchagi yig`indisi 280⁰. To`rtinchi burchagiga qo`shni bo`lgan burchakning qiymatini toping.
A) 80⁰ B) 70⁰ C) 100⁰ D) 110⁰
4. Uchburchakning ikkita burchaklari 20⁰ va 60⁰ ga teng bo`lsa, uning noma’lum burchagini toping.
A) 100⁰ B) 20⁰ C) 80⁰ D) 120⁰
5. Agar uchburchakning A, B va C burchaklari 4; 5 va 6 sonlariga proporsional bo`lsa, A burchakni toping.
A) 60<sup>0</sup> B) 30<sup>0</sup> C) 48<sup>0</sup> D) 72<sup>0</sup>
6.Teng yonli uchburchakning asosi yon tomonidan 2 sm ga qisqa. Agar uchburchakning perimetri 19 sm bo`lsa, asosining uzunligi necha santimetrga teng ?
A) 4 B) 5 C ) 6 D) 7
7. Kasrlarning yig`indisini toping: .
A) B) C) D)
8. Kasrlarni ayiring:

A) B) C) D)

9. Kasrni qisqartiring: .

A) B) C) D)
10. Algebraik kasrning son qiymatini toping: , bunda a= 4, b= -5.
A) -3,75 B) C) 3,75 D)
11. Surati p va q sonlarining kvadratlarining yig`indisiga, maxraji esa ularning ko`paytmasiga teng bo`lgan algebraik kasrni yozing.
A) B) C) D)
12. Hisoblang: 21,3 · 27 – 2 · 21,3 + 28,7 · 53 – 28 · 28,7.
A) 1300 B) 1330 C) 1250 D) 1800
13. Ko`paytuvchilarga ajrating: a² + ab -5a – 5b.
A) (a+b)(a-5) B) (b-5)(a+2) C) (b+a)(b+2) D) (a-3b)(a-5)
14. Tenglamani yeching: (2x+3)² - 4(x-1)(x+1)=49
A) 4 B) 3 C) -3 D) -4
15. Ko`paytuvchilarga ajrating: 25a² - 4b² + 10a + 4b.
A) (5a-2b)(5a +2b + 2) B) (5a + 2b)(5a – 2b + 2) C) (5a-2b)(5a-2b -2) D) (5a+2b)(5a+2b -2)
16. Ko`paytuvchilarga ajrating: 8a³-2ab²
A) 2a(2a-b)² B) 2a(2a+b)(2a-3b) C) 2a(2a-b)(2a+b) D) (2a-b)(4a²+ab+b²)
17 . Amallarni bajaring: ( ) : ( 2a + 3b).
A) B) 6ab C) 1 D) 2a + 3b
18. Kasrlarni ko`paytiring:
A) 15 B) C) D) .
19. Kasrlarni ko`paytiring: .
A) B) C) D)

20. Amallarni bajaring:

A) B) 0 C) D)
21. Hisoblang:
A) 2 B) C) 8 D)
22. Kasrlarni bo`ling: : .
A) B) C) D)
23. Kasrlarni ko`paytiring: .
A) B) C) D)
24. Uzunliklari 3 sm, 4 sm , 5 sm, 7 sm bo`lgan kesmalardan nechta uchburchak yasash mumkin ?
A) 5 B) 2 C) 3 D) 4
25. Quyidagi mulohazalardan qaysi biri noto`g`ri ?
A) Uchburchakda katta burchak qarshisida katta tomon yotadi.
B) Uchburchakda katta tomon qarshisida katta burchak yotadi .
C) Uchburchakda kichik burchak qarshisida kichik tomon yotadi
D) Uchburchakda kichik burchak qarshisida katta tomon yotadi.