7- sinf matematika test
1. Ko`ylakning narxi 20 % ortdi. Ma`lum vaqtdan so`ng yangi narx ham 25 % pasaytirildi Matoning narxi jami necha foiz o`zgardi.
A) 10 % ortdi B) 10 % kamaydi C) o`zgarmadi D) 5 % ortdi
2 1
2. Proporsiyaning noma`lum haqini toping 4 — : 2 — = 3,2 : x
7 7 5
A) 3,2 B) 16 C) 1,6 D)——
7
3. To`g`ri to`rtburchakning yuzi S ga , asosi esa a ga teng . Uning perimetrini topish uchun ifoda tuzing.
s s s 2 s
A) 2 (— + a) B) — + a C) —— + a D) ——
a a 2 a a
4. Sondan uning uchdan biri va to`rtdan biri ayrilsa, 8 qoladi. Sonning o`zini toping.
A) 18 B)16 C)24 D)12
5. Agar a = - 8,5 bo`lsa u holda – 0,76 a + 0,44a + 0,76a + 0,56a ni soddalashtiring va uning son qiymatini toping.
A) -8,5 B) 85 C) -85 D) -2,28
6. Buyurtmani 1 – ishchi 12 kunda 2-ishchi esa 15 kunda bajaradi, ikki ishchi birgalikda 6 kunda buyurtmaning qanday qismini bajaradilar?
7 4
A) 0, (9) B) 0,9 C) — D) —
10 5
7. 2,6 (1,2 + 5 x) – 136,44 = 3,2 . (3,9 - x) tenglamaning ildizi 8 dan qancha ko`p.
A) 3 B) 2 C) 2,5 D) 1
8. 9 * 950 yozuvda yulduzchani shunday raqam bilan almashtiringki, 45 ga qoldiqsiz bo`linadigan son hosil bo`lsin.
A) 4 B) 2 C) 5 D) 6
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