V sinflar uchun matematika fanidan test topshiriqlari. I variant

VII sinflar uchun algebra fanidan test topshiriqlari.
I variant

1. 
   a=2,5, b =3,6, h=1,5 bo`lsa, s=2b( a+h) ifodaning qiymatini toping:
   

.A.28,8 B. 288 C. 28 D. 254

2. 
   a =12,5, h =6,4 bo`lsa, S = ah ifodaning qiymatini toping:
   

A.40 B.400 C,4 D.36,1
3.To`g`ri to`rtburchakning yuzi S ga asosi a ga teng. Uning perimetrini toppish uchun ifoda tuzing:
A. S/(2a)+a B. Sa+2a C.2( +a ) D. S/a + a
4. a =2,5, b =2,4 va c =3,5 bo`lsa, V =abc ifodaning son qiymatini toping:
A. 18,3 B.21 C.2,1 D.12,1
5.Ona farzandi uchun a so`mdan 8 ta rasm daftar, b so`mdan 5 ta ruchka, c so`mdan 20 ta daftar sotib oldi. Jami xaridni hisoblash formulasini yozing:
A. 8a+5b+20c B.8a+25(a+b) C.800abc D.8a+100bc
6. Qavslarni oching va soddalashtiring; 5a+(2a – (6a+5)
A.8a+3 B. a-5 C. 4a-5 D. 3-4a
7. Qavslarni oching , soddalashtiring va a =2,4 b =1,5 da hisoblang:
0,5( 2a-3b) – (4b+2,5a)
A.17,4 B.-17,4 C. -1,4 D.-11,85
8.Ifodani soddalashtiring va uning a =2,7, b =4,2 bo`lgandagi qiymatini toping:
3 ( 2a –b) –2(a-2b)
A.24,36 B. 27,6 C.8,7 D.15
9.Ifodaning son qiymatini toping: (64,2*7,02+17,9*14,04):4
A.169 B.16,9 C.159 D.15,9
10. .Ifodaning son qiymatini toping: 3 *0,87 -2,34*1,8+5
A.67 B.3,788 C. -6,2 D.-3,788
11.Ifodaning son qiymatini toping: (35,7*12,24-21,4*6,12):1
A. 578 B.306 C.162 D. 16,2
12. .Ifodaning son qiymatini toping(-1,5)*(2,7:(-0,9)-(-7,2):3,6+2,4*(-2,5)
A.-6 B.-7,5 C. 7,5 D.-4,5
13.Tenglamani yeching: 5x+3(3x+7)=35
A. 1 B. -1 C. 2 D.2,5
14. Tenglamani yeching: 9x -23 =5x -11
A. -3 B. 3 C.5 D.10
15. Uchta javonda hammasi bo1lib 385ta kitob bor. Birinchi javonda ikkinchisiga qaraganda 8ta ko`p, ammo uchinchi javondan 9ta kam kitob bor Har bir javonda nechtadan kitob bor?
A.128;120;137 B. 127;119;139 C. 127;122;136 D. 126;134;125
16. 4(2x+5) =2:(3x-2) tenglamaning ildizi x₀ bo`lsa, 4x₀ +11 ifodaning son qiymatini toping:
A.-18 B. -20 C.19 D.20
17.Teng yonli uchburchakning perimetri 51sm ga teng. Asos yon tomondan 6sm uzun. Shu uchburchak yon tomonining asosga nisbatini toping:
A. 7:5 B. 5:7 C. 2:3 D.10:7
18.Tenglamani yeching: 8(x+2) -5x = -2(x+4,5)
A. -5 B. 5 C.6 D.-4,5
19. Tenglamani yeching: 3(x+2)-2(x+3) =7-5(x+1)
20. Oxshash hadlarni ixchamlang: 2,1m+n -3,2n +2m +1,1m –n
21 Agar h =6, r =2, R =4 b0lsa, V = r( R²+Rr +r²) ifodaning son qiymatini toping.
22.Uchburchakning bir tomonining uzunligi a ga teng bo`lib, u ikkinchi tomonidan 2sm qisqa, uchinchi tomonidan esa 3sm uzun. Shu uchburchakning perimetrini hisoblash uchun formula yozing.
23.Tenglamani yeching; 6(2,3x -1)-3,5x+0,7x =0,5(x-14)
24.Tenglamani yeching; 17x+25 =5x +13
25. .Tenglamani yeching; 8y-9-4y+5 =12y-4-5y
Javoblar.

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
A	A	C	B	A	B	D	D	A	B	C	D	A	B	A	D	B	A

19.
20. 5,2m-3,2n
21. 56
22.3a-1
23. - -
24. x = -1
25. y =0