Matematika 8 sinf uchun test savollari I variant

Matematika
8 sinf uchun test savollari
III variant

1. 
   Agar
   

bo`lsa, x(y+7) ning qiymatini toping.
A)16 B)18 C)20 D)14
2. Sonlarni kamayish tartibida joylashtiring:
A) B) C) D)

3. 
   Agar bo`lsa, funksiyaning grafigi qaysi choraklardan o`tadi?
   

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

3. 
   tenglamaning natural sonlardan iborat yechimlaridan y ning qiymatini ko`rsating.
   

A) 4 B) 7 C) 3 D) 2

3. 
   tenglamaning ildizlari yig`indisi bilan ko`paytmasining yig`indisi nechaga teng?
   

A) 2,5 B) 7 C) 2,8 D) 3,5

3. 
   Ushbu y=kx+l (k<0 va l<0) funksiyaning grafigi qaysi choraklarda joylashgan?
   

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

3. 
   Agar bo`lsa, ifoda qanday qiymatlarni qabul qiladi?
   

A) 0 B) C) 4; 0 D) 0; 1,5

3. 
   tengsizlikar sistemasining butun sonlardan iborat yechimlari yig’indisini toping.
   

A)6 B)7 C)9 D)15

3. 
   Tenglamaning eng katta va eng kichik ildizlarining ayirmasini toping: .
   

A) 6 B) 0 C) 1 D) 8

3. 
   Asoslari 16 va 12 ga, o`tmas burchagi esa 120<sup>0</sup> ga teng bo`lgan teng yonli trapetsiyaning yuzini hisoblang.
   

A) B) C) D) 42

3. 
   Burchaklari 150⁰ dan bo`lgan qavariq ko`pburchakning nechta tomoni bor?
   

A) 5 B) 7 C) 10 D) 12

3. 
   Aylananing qismiga teng bo`lgan yoyni tortib turuvchi markaziy burchakni toping.
   

A) 45⁰ B) 60⁰ C) 90⁰ D) 30⁰

3. 
   140⁰ li yoyni tortib turuvchi vatar shu vatar ajratgan yoylarning kattasining ixtiyoriy nuqtasidan qanday burchak ostida ko`rinadi?
   

A) 110⁰ B) 70⁰ C) 115⁰ D) 65⁰

3. 
   bo‘lsa ifodani qiymatlarini toping.
   

A) 0 B) C) 4; 0 D) 0; 1,5

3. 
   Katetlari 40 va 30 ga teng bo`lgan to`g`ri burchakli uchburchakka ichki chizilgan aylananing radiusini toping.
   

A) 10 B) 7 C) 6,5 D) 7,5

3. 
   Agar AC=17, BD=24 bo`lsa, ABCD rombning yuzini toping.
   

A) 254 B) 245 C) 508 D)112

3. 
   Ifodani soddalashtiring:
   

A) B) C) D)

3. 
   Kasrni qisqartiring:
   

A) B) C) D)

3. 
   Tomonlari 8,10 va 14 bo`lgan uchburchakning yuzini toping.
   

A) B) C) D)

3. 
   Uchburchakning o`rta chizig`i asosidan 5,4 sm kichik. Uchburchakning o`rta chizig`I va asosining yig`indisini toping.
   

A) 13,5 sm B) 16,2 sm C) 10,8 sm D) 21,6 sm

3. 
   Tomonlari AB=21, BC=72, AC=75 bo`lgan ABC uchburchakning AB tomoniga tushirilgan balandligini toping.
   
4. 
   Yuzi 400 sm² bo`lgan to`g`ri to`rtburchakning tomonlari 4:1 nisbatda bo`lsa, uning perimetrini toping.
   
5. 
   Tengsizlikni yeching:
   
6. 
   Burchaklari 108⁰ dan bo`lgan qavariq ko`pburchakning nechta tomoni bor?
   
7. 
   Teng yonli trapetsiyaning diagonallari to`g`ri burchak ostida kesishadi. Asoslarining yig`indisi 2а ga teng. Trapetsiyaning yuzini toping.
   
8. 
   Tengsizliklar sistemasini yeching:
   
9. 
   Yuzasi 144 sm², balandliklari 8 sm va 12 sm bo’lgan papallelogramning peremetrini toping.
   
10. 
    Teng yonli to`g`ri burchakli uchburchakning gipotenuzasi ga teng bo`lsa, uning yuzini toping.
    

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3. 
   AB vatar 560 li yoyni tortib turadi. Vatar va shu vatar oxirlaridan aylanaga o`tkazilgan urinmalar orasidagi burchakni toping.
   

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3. 
   0,00280128 sonini standart shaklda yozing.