4-sinf Matematika - Perimetr va yuzni topish formulalari bilan tanishtirish dars ishlanma

Mavzu: Perimetr va yuzni topish formulalari bilan tanishtirish 107-108- betlar Mustaqil topshiriqni tekshirish (107-b). 6-topshiriq. a = 6 cm, b = 11 cm bo'lsa, P = 2 (a + b) formula yordamida to'g'ri to'rtburchak-ning perimetrini toping. yechish: P = 2 (a + b) = 2 (6 +11) = 34 cm Javob: to'g'ri to'rtburchakning perimetri 34 cm. 6 cm 11 cm P = ? cm Mustaqil topshiriqni tekshirish (107-b). 7-topshiriq. Quyidagi tengliklar to'g'ri yoki noto'g'riligini tekshiring: 547 891 : 457 = 87 457 821 : 658 = 96 547 891 457 1 457 90 8 1 457 451 9 9 411 3 406 1 8 3656 405 (q) (405 q) 457 821 658 6 394 8 63 0 2 9 59 22 3 80 1 5 3 290 511 (q) 511(q) 1-topshiriq. 1) To'rtburchakning perimetrini toping. 3 cm 5 cm 3 cm 4 cm yechish: P = 5 + 3 + 3 + 4 = 15 cm Javob: to'rtburchakning perimetri 15 cm. 1-topshiriq 2) a = 4 cm, b = 2 cm, c = 3 cm, d = 2 cm bo'lsa, P = a + b + c + d formula yordamida ushbu to'rtbur-chakning perimetrini toping. c b d a 4 cm 2 cm 3 cm 2 cm yechish: P = 4 + 2 +3 + 2= 11 cm Javob: to'rtburchakning perimetri 11 cm. 2-topshiriq. Rasmda shakllar tasvirlangan. Har bir shaklning perimetrini hisoblash formulalarini yozing. P = ? P = ? Mustaqil bajaring. 3-topshiriq. To'g'ri to'rtburchak shaklidagi yer ...