Matematika. 8 sinf. Test savollari.
1. 6 sm li vatar aylanadan 900 li yoy ajratadi. Aylana markazidan vatargacha bo`lgan masofani toping.
A) 3 sm B) 4 sm C) 6 sm D) 8 sm
2. Tomonlari 70 sm, 58 sm va 16 sm ga teng bo`lgan uchburchakning yuzini toping.
A) 72 B) 144 C) 276 D)336
3. Uchburchakning tomonlari 30 sm, 25 sm va 11 sm ga teng. Shu uchburchakning katta balandligini toping.
A) 24 sm B) 8,8 sm C) 10,56 D) 33
4. To`g`ri burchakli uchburchakning bir kateti 0,5 smga, gipotenuzasi esa 1,3 smga teng. Ikkinchi katetni toping.
A) 0,9 B) 1 C) 1,1 D) 1,2
5. Tog`ri burchakli uchburchakning katetlari 9 sm va 40 sm ga teng. Uning gipotenuzasi va yuzini toping.
A) 41 sm va 360 sm2 B) 49 sm va 360 sm2 C) 41 sm va 180 sm2 D) 49 sm va 180 sm2.
6. Diagonallari 16 va 12 ga teng bo`lgan rombning yuzini toping.
A) 192 B) 96 C) 100 D) 28
7. ABCD trapetsiyada ( BC ׀׀ AD) BC = 10 sm, AD = 18 sm, balandligi 6 sm. Trapetsiyaning yuzini toping.
A) 84 sm2 B) 1080 sm2 C) 144 sm2 D) 120 sm2
8. Yuzi 2,89 sm2 ga teng bo`lgan kvadratning perimetrini toping.
A) 3,4 sm B) 6,8 sm C) 5,1 sm D) 11,56
9. Ikki sonning ayirmasi 3 ga, ularning ko`paytmasi 28 ga teng. Shu sonlarni toping.
A) 7 va 4 B) 5 va 2 C) 14 va 2 D) 11 va 8
10. Tenglamalar sistemasini yeching:
A) X= - 4, Y= -1 B) X=1, Y= -4 C) X= 4, Y= -1 D) (1;4) va (4;1)
11. Tenglamani yeching: x4 – 5x2 + 4=0.
A) x1,2= ± 4, x3,4= ± 1 B) x1,2= ± 2, x3,4= ± 1 C) x1,2= ± 4 D) x1,2= ± 2
12. Kvadarat tenglamani yeching: x2 + 7x+6 = 0.
A) x1=1, x2= -1 B) x1=6, x2= -1 C) x1= -6, x2= -1 D) x1=1, x2= -6
13. x2+px-12=0 tenglamaning ildizlaridan biri 4 ga teng. Shu tenglamaning p koeffitsiyentini toping.
A) -1 B) 1 C) 3 D) -3
14. x2 -19x +18 = 0 tenglamaning ildizlaridan biri 1 ga teng. Uning ikkinchi ildizini toping.
A) 19 B) 18 C) -19 D) -18
15. Ildizlari 3 va 4 bo`lgan keltirilgan kvadrat tenglama tuzing.
A) x2-7x+12=0 B) x2+7x+12=0 C) x2-7x-12=0 D) x2-x+7=0
16. 2x2 +5x – 7 = 0 kvadrat tenglama nechta yechimga ega ?
A) 2 B) 1 C) 0 D) bilmayman
17. Tenglamani yeching: x2 + 9x = 0 tenglama ildizlari yig`indisini toping.
A) 0 B) 9 C) -9 D) 18
18. Hisoblang:
A) 72 B) 12 C) 48 D) 38
19. Hisoblang:
A) 1 B) C) D)
20. Qaysi javobda irratsional son ko`rsatilgan.
A) -2 B) 17 C) D) 3,1(43)
21.Sonni standart shaklda yozing: 0,00000078
A) 7,8·107 B) 7,8· 10-7 C) 0,78·10-5 D) 78·10-7
22. Xonaning uzunligi ( 5±0,02) m ga teng. O`lchashning nisbiy xatoligini toping.
A) 4 % B) 0,4 % C) 0,02 % D) 0,05 %
23. Tengsizlikni yeching: | 3x-4 |<5.
A) < x < 9 B) < x < 3 C) -1< x < 2 D) -3 < x <
24. Tengsizlikni yeching: | x -1 | > 2.
A) x (-∞;-1) U (3;∞) B) x (-∞;-3) U (1;∞) C) x (-∞;1) U (3;∞) D) x (-∞;-3) U (-1;∞)
25. | 3x-4 | = 5 tenglamaning ildizlari ko`paytmasini toping.
A) 1 B) 3 C) -3 D) -1
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