4sinf_matem perimetr va yuzani topish formulalari

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 …

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