8-sinf matematika

8-sinf matematika.

1. 
   Algebraik ifodaning son qiymatini toping: 2a-3b, bunda a=2, b=-1
   

1. 
   7 b) -7 s) -1 d) -2
   

2. 
   Kasrni qisqartiring:
   

1. 
   b) s) d)
   

3. 
   Qo’shishni bajaring:
   

1. 
   b) s) d)
   

4. 
   Sakkizburchakning ichki burchaklari yig’indisini toping.
   

1. 
   1040 b) 1050 s) 1800 d) 1080
   

5. 
   Qavariq to’rtburchakning burchaklari 1, 2, 3 va 4 sonlariga proporsional. Shu burchaklarning kichigini toping.
   

1. 
   36⁰ b) 108⁰ s) 100⁰ d) 72⁰
   

6. 
   Amallarni bajaring:
   

1. 
   b) s) d)
   

7. 
   y= funksiyaning grafigi k>0 bo’lsa qaysi choraklarda yotadi?
   

1. 
   I va II b) I va IV s) I va III d) II va IV
   

8. 
   y= funksiyaning grafigi qanday nomlanadi?
   

1. 
   parabola b) to’g’ri chiziq s) egri chiziq d) giperbola
   

9. 
   Parallelogramning perimetri 152 cm, tomonlaridan biri ikkinchisidan 25 cm ortiq. Parallelogramning tomonlarini toping.
   

1. 
   25,5cm va 50,5cm b) 20,5cm va 30,5c s) 25cm va 30cm d) 20,5cm va 55,5cm
   

10. 
    To’g’ri to’rtburchakning perimetri 24cm. Tog’ri to’rtburchakning ixtiyoriy ichki nuqtasidan uning tomonlarigacha bo’lgan masofalar yig’indisini toping.
    

1. 
   16cm b) 12cm s) 20cm d) 18cm
   

11. 
    Kasrlarni bo’ling: Javob: ____________________
    
12. 
    Yig’indini bajaring: Javob: _____________________
    
13. 
    y= funksiya grafigi qaysi chorakda yotadi? Javob:_________________
    
14. 
    Rombning dioganallari bilan tomonlari orasida hosil bo’lgan burchaklarning nisbati 2:7 kabi. Rombning burchaklarini toping. Javob:___________________
    
15. 
    Trapetsiyaning asoslari 10 va 30 ga teng. Trapetsiyaning o’rta chizig’ini toping. Javob:__________________