4-sinf Matematika Formulalar taqdimot

Mavzu: Formulalar 105-105- betlar Mustaqil topshiriqni tekshirish (105-b). 5-topshiriq 328 km 040 m 179 km 825 m 3 kg 054 g 7 kg 820 g 148 km 215 m 328 040 m 179 825 m 148 215 m 10 kg 874g 3 054 g 7 820 g 10 874g + + Mustaqil topshiriqni tekshirish (105-b). 6-topshiriq (8 700 - x) : 900 = 9 70 500 : (x - 32 500) = 141 8 700 - x = 900 9 8 700 - x = 8 100 x = 8 700 - 8 100 x = 600 (8 700 - 600) : 900 = 9 9 = 9 x - 32 500 = 70 500 : 141 x - 32 500 = 500 x = 500 + 32 500 x = 30 00 70 500 : (30 00 - 32 500) = 141 141 = 141 1-topshiriq. 1) a) Bo'yi 3 cm, eni 2 cm bo'lgan to'g'ri to'rtburchakning perimetrini toping. 2 cm 3 cm P = ? yechish: (3 + 2) 2 = 10 (cm) Javob: to'g'ri to'rtburchakning perimetri 10 cm 1-topshiriq. b) Bo'yi 4 cm, eni 5 cm bo'lgan to'g'ri to'rtburchakning perimetrini toping. 5 cm 4 cm P = ? yechish: (4 + 5) 2 = 18 (cm) Javob: to'g'ri to'rtburchakning perimetri 18 cm 1-topshiriq. 2) To'g'ri to'rtburchakning tomonlarini a (bo'yi) va b (eni) harflari bilan belgilaymiz. Perimetrini P harfi bilan belgilaymiz. Har qanday to'g'ri to'rtburchakning perimetrini topish formulasini yozamiz: b a P = 2 ...