Qashqadaryo viloyati xtb shahrisabz tuman 68-sonli o’rtamaktab matematikafanio’qituvchisiMuhammadiyevaOzodaning 5-sinf uchunmatematikafanidan 1-soatlik ochiq dars ishlanmasi

VI.Darsniyakunlash ,o’quvchilarnibaholash .
VII.Uygavazifaberish . 264-267- mashq
264. Ko‘paytirishning taqsimot xossalaridan foydalanib, ko‘paytmani qulay
usulda hisoblang:
a) 71 • 9; b) 39 • 9; d) 15 • 61; e) 5 • 52; f) 3 • 901; g) 701 • 12.
265. Qavslarni oching:
a) 9 • (5x + 2); b) 7 • (9x - 11); d) 5 • (7c + 3);
e) (10 + 7x) • 6; f) (3.y - 5) • 3; g) (9 - 5y) • 8.
266. Ifodaning qiymatini toping:
a) 12a + 51b, bunda a = 11 va b = 23; b) 59p - 23q, bundap = 13 va q = 22.
267. 528 • 5 = 528 • (10 : 2) = (528 • 10) : 2 = 5280 : 2 = 2640.
Yuqoridagi hisoblash usuliga ko‘ra sonni 5 ga ko‘paytirish qoidasini yozing.
Topilgan qoidadan foydalanib, ko‘paytmani hisoblang:
a) 248 • 5; b) 374 • 5; d) 213 124 • 5; e) 8 746 307 • 5; f) 130 379 • 5.