3) 4_sinf_matematik ko'p xonali sonni uch xonali_songa

mavzu: ko‘p xonali sonni uch xonali songa yozma bo‘lishni tekshirish 93-94-betlar mustaqil topshiriq (92-93-b). 5-topshiriq. to‘g‘ri to‘rtburchakning bo‘yi 4 dm, eni esa undan 1 dm 5 cm qisqa. to‘g‘ri to‘rtburchakning perimetri va yuzini toping. (tomonlarining uzunligini santimetrlarda ifodalang.) a b b d a c abcd – to‘g‘ri to‘rtburchak 5-topshiriq a = 4 dm b = ? 1 dm 5 cm qisqa p – ? s –? yechish: 1) 4 dm = 40 cm 2) 1 dm 5 cm = 15 cm 3) b = 40 – 15 = 25 (cm) – eni 4) p = (40 + 25) • 2 = 130 (cm) – perimetr 5) s = 40 • 25 = 1 000 (cm2) – yuza javob: to‘g‘ri to‘rtburchakning …

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