13 – nazorat ishi
I variant
Ifodaning qiymatini toping: (18 + 12 ∙ 27) : (327 - 156)
Tenglamani yeching:
Ifodaning qiymatini toping: (18 – 16,9) ∙ 3,3 + 3 : 7,5.
Uchta qo‘yni o‘lchosh (torozuda tortish) bilan ularning massagi 28,5 kg, 32,6 kg va 35,2 kg ligi aninglandi. Qoylarning o‘rtacha massasini aniqlang.
Qulupnayning tarkibida 6 % shakar bo‘lsa, 12 kg qulupnayda necha kg shakar bor?
II variant
1. Ifodaning qiymatini toping: (1350 : 45 - 15) ∙ (48 + 77)
2. Tenglamani yeching:
3. Ifodaning qiymatini toping: (21 – 18,3) ∙ 6,6 + 3 : 0,6.
4. Chang‘ichi birinchi soatda 10,8 km, ikkinchi 9,4 km, uchinchi soatda 9,2 km yol bosdi. Chang‘ichi bir soatda ortacha necha km yol bosgan?
5. Bodring tarkibida o‘rtacha 95 % suv bor. 20 kg bodringda necha kg suv bor?
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