# 7 sinf. Matematika. Iv-chorak. I-variant. Amallarni bajaring

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7 – sinf. Matematika. IV-chorak. I-variant.
1. Amallarni bajaring.
A) 30 ; B) 40,5; D) 40 ; E) 30,5; F) 41;
2. Algebraik ifodaning son qiymatini toping.
A. ; B. ; D. ; E. ; F.
3. n = 2k + 1 formulada k = - 5 bo’lganda n ning quymatini toping .
A. –5 B. 8 D. –9 E. 0 F. -7
A. 37; B. 33; D. - 40; E. – 33; F. 40.
4. Ifodalarning son qiymatlarini taqqoslang.
A. (a+b)2 <5ab; B. (a+b)2 >5ab; D. (a+b)2 =5ab; E. (a+b)2 >6ab; F. (a- b)2 >5ab;
5. A = 2n formulada A = 72 bo’lsa n ning qiymatini toping.
A. 36 B. 48 D. 24 E. 32 F. 60
6. .|----------------|-----------|---------| AB=16sm; AS=7sm; DB=4sm bo’lsa, SD kesmani toping.
A S D B
A. 6sm; B. 5sm; D.4sm; E. 7sm; F. 5,5sm;
7. Tenglamani eching:
A. x=4 ; B. x=6; D. x=2; E. x=5; F. x=- 5;
8. Tenglamani yeching . 8 x – 3 = 5 x + 12
A. 6 B. 5 D. 8 E. 9 F. 12
9. Tenglamani eching:
A. x=0; B. x=17; D. x= -17; E. yechimga ega emas; F. x= -0;
10. Zavod mashina ishlab chiqarish buyurtmasini 20 kunda bajarishi kerak edi. Lekin zavod har kuni rejalashtirilganidan tashqari 1ta mashina ortiq ishlab chiqarganligi sababli, muddatidan bir kun oldin buyurtmani bajaribgina qolmasdan, balki qoshimcha 4 ta ortiq mashina ishlab chiqargan. Zavod buyurtma bo’yicha nechta mashina ishlab chiqarishi kerak edi?
A. 300ta; B. 400ta; D. 404ta; E. 304ta; F. 3001 ta.

A. 18 B. 28 D. 32 E. 120 F. 645
12. Hisoblang: ;
A. 2; B. 8; D. 4; E.16; F. 9.
13. Hisoblang.

## A. 81 B. 27 D. 9 E. 3 F. 1

14. Tenglamani eching. – x – 1 = x;

A. x=-1; B. x=1; D. x=0,5; E. x= - 0,5; F. x = 2.
15. Ifodani soddalashtiring. 3(2x+1) + 5(1+3x);
A. 21x - 8; B. 21x + 8 ; D. 11x + 8; E. 11x – 8; F. 22x + 7.
16. Ko’phadning son qiymatini toping 2a3 - 3ab + b2 bunda a = 0,2; b = 1/2
A. – 0,28 B. 0,25 D.-0,034 E. 1, 4 F. – 2,25.
17. < A= 970 ; < B= 120 53/ bo`lsa A. 8407/ ; B. 8507/ ; D. 83051/ ; E. 8307/ ; F. 830 7/ ;
18. Ikkita to`g`ri chiziqning kesishmasidan hosil bo`lgan burchaklardan biri 600 bo`lsa qolgan burchaklarini toping.
A. 30;150;150; B. 40; 140;140; D. 50,130,130; E. 60,120,120; F. 65;120;120.
19. Ifodani asosida «a» bo’lgan daraja shaklida tuzing.

21. Otasi 32 yoshda o’gli esa 6 yoshda. Necha yildan keyin otasi o’g`lidan 3 marta katta bo’ladi?

22. Sonli ifodaning qiymatini toping;

23. Tenglamani eching .

25. Tenglamani eching.

7 – sinf. Matematika. IV-chorak.

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 D E D A A B E B E A F D D E B D A E 19 20 21 22 23 24 25 A9 2x2+x-15 7yil X=10 4x2+12xy+9y Cheksiz ko’p