Matematika. 7 sinf. Test savollari. I variant

Matematika. 7 sinf. Test savollari. I - variant.

1. To`rtburchak barcha burchaklari yig`indisi nech gradusga teng ?

A) 180⁰ B) 270⁰ C) 360⁰ D) 540⁰
2. Agar uchburchakning ikkita burchagi 60⁰ va 40⁰ ga teng bo`lsa, uning noma’lum burchagini toping.
A) 100⁰ B) 20⁰ C) 80⁰ D) 120⁰
3. Agar uchburchakning burchaklari 2,3,4 sonlariga proporsional bo`lsa, ularni toping.
A) 40⁰, 60⁰, 80⁰ B) 20⁰, 30⁰, 40⁰ C) 30⁰, 45⁰, 60⁰ D) 80⁰, 120⁰, 160⁰
4. Kasrlarning yig`indisini toping: .
A) B) C) D)
5. Kasrlarning ayirmasini toping: .
A) B) C) D) .
6. Kasrni qisqartiring: .
A) B) C) D)
7. Algebraik kasrning son qiymatini toping: , bunda a=16, b= -3.
A) 1,3 B) C) 1,6 D) 1,9
8. Surati p va q sonlarining ayirmasiga, maxraji esa ularning ko`paytmasiga teng bo`lgan algebraik kasrni yozing.
A) B) C) D)
9. Ko`paytuvchilarga ajrating: 16a² – 81.
A) (4a-3)(4a+3) B) (4a-9)(4a+9) C) (16a – 81)(16a +81) D) (4a – 9) ²
10. Ko`paytuvchilarga ajrating: 3a³ – 3.
A) 3 (a-1)(a² + a + 1) B) 3 (a-1)(a+1) C) 3 (a-1)(a² - a + 1) D) 3 (a-1)(a² - a - 1)
11. Tenglamaning ildizlarini toping: x² – 49 = 0.
A) 7 va -7 B) 49 va – 49 C) 7 D) -7
12. Hisoblang: 29,4² – 29,3².
A) 58,7 B) 5,87 C) 0, 587 D) 0,01
13. Soddalashtiring: (c-3)² – (c+3)(3-c)
A) -6c B) 2c² – 6c C) 2c² – 6c +18 D) 0
14) Ko`paytirishni bajaring: (x² + 1)(x -1)(x+1)
A) x⁴+1 B) x⁴ – 1 C) (x - 1)⁴ D) (x + 1)⁴
15. x ni shunday birhadga almashtiringki, natijada ikkihadning kvadrati hosil bo`lsin:
a² – 6ab + x
A) 9b² B) b² C) 36b² D) 3b
16. Hisoblang: 139∙15 + 18∙139 + 15∙261 + 18∙261.
A) 13200 B) 132400 C) 1320 D) 1324
17. Hisoblang: 26∙ − ∙23 .
A) 4 B) 3 C) D) 2
18. Hisoblang: (12a⁴b³ +21a²b⁴) : 3a²b³
A) 4a + 7 b B) 4ab + 7b C) 4a² + 7b D) 4a² + 7ab
19. Birhadning son qiymatini toping: , bunda a= -2, b= -1, c=10.
A) -8 B) 8 C) D) -
20. O`xshash hadlarni ixchamlang: 5a² – 4b² – 3a² + b² .
A) -6a²b² B) 2a²-3b² C) a²-2b² D) 6a²b².
21. Agar uchburchakning ikkita burchagi 40⁰ va 30⁰ ga teng bo`lsa, uning uchinchi burchagiga qo`shni burchagini toping.
A) 100⁰ B) 70⁰ C) 110⁰ D) 120⁰
22. Uzunliklari 4 sm, 5 sm , 6 sm, 7 sm bo`lgan kesmalardan nechta uchburchak yasash mumkin ?
A) 5 B) 2 C) 3 D) 4
23. Tog`ri burchakli uchburchakning gipotenuzasi 12 sm, 30⁰ li burchak qarshisidagi katet uzunligini toping.
A) 4 sm B) 6 sm C) 9 sm D) 12 sm
24. Quyidagi mulohazalardan qaysi biri noto`g`ri ?
A) Uchburchakda katta tomon qarshisida katta burchak yotadi .
B) Uchburchakda katta burchak qarshisida katta tomon yotadi.
C) Uchburchakda kichik burchak qarshisida katta tomon yotadi.
D) Uchburchakda kichik burchak qarshisida kichik tomon yotadi
25. Teng yonli tog`ri burchakli uchburchak kichik burchagini toping.
A) 30⁰ B) 45⁰ C) 15⁰ D) 60⁰