Savollar kitobi

Matematika
31. Qanday nisbatlar proporsiya tashkil qiladi?

1) 15:5 va 15:2 2) 10:4 va 15:6

3) 40:30 va 20:15 4) 21:5 va 62:12

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

32. To`g`ri to`rtburchakning bo`yi 3,8 sm, eni

bo`yidan 1,3 sm qisqa. Shu to`g`ri to`rtburchakning yuzini toping?

A) 3,25 sm² B) 4,84 sm²

C) 9,5 sm² D) 95 sm²

33. Ombordagi ozuqa 8 ta qo’yga 15 kunga

yetadi. Shu ozuqa 6 ta qo’yga necha kunga yetadi?

A) 9 kunga B) 20 kunga

C) 10 kunga D) 18 kunga

34. Ifodaning qiymatini toping? 12 − 6 : 3 + 2 · 4=

A) 16 B) 10 C) 18 D) 48

35. Ifodaning qiymatini toping? 15 − 9 : 3 + 4 · 3=

A) 24 B) 18 C) 48 D) 12

36. Ifodaning qiymatini toping? 18 − 12 : 2 + 5 · 3=

A) 18 B) 24 C) 4 D) 27

37. Hisoblang? 1,25 0,8=

A) 1 B) 2 C) 4 D) 0,7

38. Hisoblang? 12,8 : 4=

A) 1,2 B) 3,2 C) 4,2 D) 0,7

39. Mashina soatiga 72 km tezlik bilan 3 soat-u

20 minut yurdi. U shu masofani 2 soat-u 40 minutda o’tishi uchun qanday tezlik bilan yurishi kerak?

A) 96 km/soat B) 82 km/soat

C) 100 km/soat D) 90 km/soat

40. Hisoblang: (8,4+2,1)∙4,2–14,4:2,4

A) 50,1 B) 44,1 C) 38,1 D) 48,1

41. To`g`ri to`rtburchak shaklidagi maydonning yuzi 40,5 m<sup>2</sup>, eni 72 dm. Shu to`g`ri to`rtburchakning bo`yini toping?

A) 56,25 dm B) 5,625 dm

C) 50,75 dm D) 54,25 dm

42. Tenglamaning natural yechimlarini toping?

(2132 - x ∙x ) : 16 = 121

A)196 B)14 C)13 D)16

43. To‘g‘ri to‘rtburchakning perimetri 7,2 dm

ga teng bo‘lib, bo‘yi enidan 6 sm uzun.

Shu to‘rtburchakning yuzini toping?

A)315 B)300 C)400 D)21

44. Ko‘paytuvchilarga ajrating?

ax + bx - 3ay - 3by

A) (a + b)(x + 3y) B) (a - b)(x + 3y)

C) (a - b)(x - 3y) D) (a + b)(x - 3y)

45. Ko‘paytuvchilarga ajrating?

7a(5a - 3b) -10a + 6b.

A) (5a + 3b)(7a - 2) B) (3b - 5a)(7a + 2)

C) (5a - 3b)(7a - 2) D) (5a - 3b)(7a + 2)