8-sinf. Matematika. Bilimlar bellashuvi uchun

8-sinf. Matematika. Bilimlar bellashuvi uchun

1. Teng tomonli uchburchakning perimetri 48 sm ga teng. Uchburchakning o’rta chizig’ini toping.

A) 8 sm B) 7 sm C) 6 sm D) 24 sm

2. Qavariq o’n ikki burchakning nechta diagonali bor?

A) 170 B) 108 C) 54 D) 60

3. Agar bo’lsa, ifodaning qiymatini toping: .

A) 10 B) 0,1 C) 20 D) 0,2

4. funksiya grafigiga tegishli nuqtani toping.

A) B) C) D)

5. Agar funksiyaning grafigi M(2; –8) nuqta orqali o’tsa, k koeffitsiyentning qiymatini toping.

A) B) C) 7 D)

6. y = - 4,5 x funksiyaning grafigi qaysi koordinata burchaklarida joylashgan?

A) I,II B) I, III C) II, IV D) II,III

7. y = -3x + b funksiyaning grafigi M (-2; 4) nuqtadan o`tishi ma’lum bo`lsa, b ning qiymatini toping.

A) -1 B) -2 C) 4 D) -3

8. y = kx + b funksiya grafigi A (0; 3) va B (1;2) nuqtalardan o`tadi. k va b ni toping.

A) k = -1, b = 1 B) k = 2, b = -4 C) k = -1, b = 3 D) k =1, b = 3

9. A ٠ X = B tenglama A = 0 , B = 0 bo`lganda nechta yechimga ega ?

A) 1 B) 2 C) yechimga ega emas D) cheksiz ko`p yechimga ega.

10. Ikki sonning yig`indisi 35 ga teng, ularning ayirmasi esa 1 ga teng. Shu sonlarning ko`paytmasini toping.

A) 306 B) 248 C) 196 D) 66

11. Agar -2< a <-1 va -3 < b < -2,5 bo`lsa, a – b ayirma qaysi sonlar orasida bo`ladi?

A) (1;1,5) B) (-1,5;-1) C) (-1;1,5) D) (0,5;2)

12. 1 ≤ ≤ 4 tengsizlikning tub sonlardan iborat nechta yechimi bor ?

A) 3 B) 4 C) 5 D) 6

13. tengsizliklar sistemasining eng katta va eng kichik butun yechimlri yig`indisini toping.

A) 15 B) 16 C) 17 D) 18

14. Quyidagi 7< x < 105 tengsizlikni qanoatlantiruvchi va bo`luvchisi 13 ga teng bo`lgan nechta natural son mavjud ?

A) 8 B) 9 C) 10 D) 11

15. Tengsizliklar sistemasini yeching:

A) [-3;5) B) [-6;6) C) (2;4] D) yechimga ega emas

16. : (-5) = -2 tenglama ildizlarining ko`paytmasini toping.

A) 25 B) 40 C) -36 D) -100

17. `Tengsizlikni qanoatlantiradigan natural sonlarning eng kattasi topilsin:

< 5

A) 2 B) 3 C) 4 D) 5

18. Tengsizlikni yeching:

A) B) C) D) )

19. Tengsizlikni yeching:

A) Yechimga ega emas B) [-1;3] C) [1;3] D) (-∞;-1]

20. Agar to`g`ri to`rtburchakning tomonlari 4 marta orttirilsa, uning yuzi necha marta ortadi?

A) 4 B) 8 C) 16 D) 32

21. Tog`ri to`rtburchakning yuzi 400 ga, tomonlarining nisbati 4 : 1 ga teng. Shu to`g`ri to`rtburchakning perimetrini toping.

A) 100 B) 200 C) 120 D) 80

22. Yuzi 144 sm², balandliklari 8 sm va 12 sm bo`lgan parallelogrammning perimetrini toping.

A) 40 B) 30 C) 80 D) 60

23. ABCD parallelogrammning AC diagonaliga BO perpendikulyar tushirilgan.

AO = 8, OC = 6 va BO = 4 bo`lsa, parallelogrammning yuzini toping.

A) 28 B) 32 C) 52 D) 56

24. Romning diagonallari 6 va 8 ga teng. Uning yuzini toping.

A) 48 B) 36 C) 24 D) 18

25. ABC uchburchakda C burchak 135⁰ , AC = 6 dm, BD balandlik 2 dm ga teng. ABD uchburchakning yuzini toping.

A) 8 B) 6 C) 4 D) 12

26.Hisoblang: ((1807-967)∙800+103∙70)∙100+­­(847-87)-480∙107

A) 67870400 B) 6770400 C) 670400 D) 87870400

27.Tenglamalar sistemasini yeching.

A) B)

C) D)

28. Modulli tenglamani yeching.

A) B) C) -13 D) 17

29. Modulli tenglamani yeching.

A) B)

C) D)

30. Qavariq o’n yetti burchakning ichki burchaklari yig’indisini toping.

A) 2700 B) 360 C) 3060 D) 5600

1) Kasrni qisqartiring:

2) 7 ga bo’lganda qoldiq 5 ga, 19 ga bo’lganda qoldiq 9 ga teng bo’ladigan barcha ikki xonali sonlarni toping.

3) Ixtiyoriy qavariq to’rtburchak tomonlari o’rtalaridagi nuqtalarni ketma-ket tutashtirib hosil qilingan

to’rtburchak romb bo’lishini isbotlang.

4) x²-y²=3 tenglamani yechimi bo’ladigan butun sonlarning (x;y) juftliklarni toping.

5) tenglamani yeching: