Iv-blok 8- sinf tarix test

3. Qavslarni oching v asoddalashtiring? 6a + ( 2a – ( 3a + 3)) =
A) 5a – 3 B) 5a + 3 C) 6a + 4 D) – 5a – 3
4. To’g’ri to’rtburchakning bo’yi 8 sm, eni bo’yidan 2 sm qisqa. Shu to’g’ri to’rtburchakning yuzini toping?
A) 48 sm B) 64 sm C) 42 sm D) 60 sm


5.To’g’ri to’rtburchakning bo’yi 10 sm, eni bo’yidan 2,5 sm qisqa. Shu to’g’ri to’rtburchakning perimetrini toping?
A) 36 sm B) 38 sm C) 35 sm D) 40 sm


6.Soddalashtiring: 4  ( 2x + 3) + 6  ( 2 + 3x ) =
A) 26x + 24 B) 24x + 24 C) 26x D) 28x


7. Tenglamani yeching? 8( x + 2 ) – 5x = – 2( x + 4,5)
A) –5 B)– 4,5 C) 5 D) 4,5


8.Tenglamani yeching? 3x + 2x = 19 + ( – 39 )
A) 6 B) – 6 C) 5 D) 7


9.Tenglamani yeching? 5  ( x + 2 ) – 4 = 9 + 5 – 3x
A) 1 B) 3 C) 6 D) 4


10.Soddalashtiring: 5x  ( 4y – x ) =
A) 6x - 4y B) 4x + 4y C) 4x – 4y D) 0


11.Xodani 3bo’lakka arralash uchun 12 minut kerak. Shu xodani
4 bo’lakka arralash uchun necha minut kerak?
13.Soddalashtiring: 11x² + 4x – x² – 4x =
14.Agar odam yuragi 1 minutda o’rtacha 75 marta ursa, uning yuragi
5 soatda necha marta uradi?
15.Soddalashtiring: ( 2a – 5b)² + 20 ab =