Boshlang'ich sinflarda matematika o'qitish metodikasi
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12 18 35 28 25 b, sm 4 7 8 10 12 11 S 256 3. T o ‘g ‘ri to 'rtb u rch ak q o ‘shni tom onlari u zu n lig in in g y ig ‘indisi a + b = 8 dm boMsa, ja d v a ln i toMdiring: a, dm 1 2 3 4 5 6 7 b, dm S P a) tom onlari uzunligi haqida nim a d ey a o lasiz? b) y u zi v a perim etri haqida-chi? d) y u zi qay vaq td a en g katta boN ar ekan? 4. P erim etri 36 sm boMgan to ‘g ‘ri to ‘rtburchak tom onlari u z u n lig irir ja d v a lg a y o zib ch iq in g v a y u zlarin i h isoblang. T o ‘g ‘ri to ‘rtb u rch ak n in g yuzi qay v aq td a en g katta boMadi? a, sm 1 2 5 3 9 b, sm 4 7 12 8 14 S 5. Y u zi 72 sm 2 b o ig an to ‘g ‘ri U ^rtburchaknm g b ir tom oni u z u n lig ig a k o ‘ra b o sh q a tom oni uzunligini va perim etrini toping: a sm 2 3 4 6 8 9 12 18 24 b sm P, sm T o ‘g ‘ r i t o ‘ r t b u r c h a k ( k v a d r a t ) t o m o n l a r i n i n g y i g M n d i s i 1. T o m o n lari 5, 6 va 7 sm boMgan u ch b u rch ak ram k a yasash uchun q an d ay rey k a olish kerak? B u rey k ad an yan a bosh q a qancha uch b u rch ak li ram ka y asash m u m k in ? (U ch b u rch ak tom onlari butun san tim etrlard a boMsin). 2. K itob shkafi uzunligini b u tu n d etsim etrlard a oMchang. U zu n lig i shunday rey k ad a n echta to ‘rtb u rch ak li ram k a yasash m u m kin? 257 3. T o ‘rtburchakli ram k an in g uzunligi 20 m boMishi k erak edi. В undan qan ch a to ‘rtb u rch ak li ram ka yasash m u m k in ? Q an ch a b esh b u rch ak li ram ka tayyorlanadi? 4. B irinchi t o ‘rtburchak b ilan ikkinchi to 'rtb u rc h a k to m o n larining y ig 'in d is in i h isoblang. Ikkinchi shakl qanday to 'rtb u rc h a k ? 5. R asm dagi sh a k lla m in g p erim etrin i hisoblang. I I Г > 4 1 w / D a r s n a m u n a s i 1. A m aliy ish: U zunliklari b u tu n san tim etr va d etsim etrlard a b o 'lg a n q o g 'o z karton tasm alar va sim b o 'la k la rin i yasang. 2. M ehnat darsida y asalg an k o n v ertn in g tom onlarini y ig 'in d is in i h isoblang. K on v ertn i y asash uchun n ech ta geo m etrik shakldan foyd- alan d ik ? K onvertning y o y ilm asid a n echta u ch b u rch ak , qan ch a to 'rtb u rc h a k bor? 3. 3 sm uzunlikdagi b ir xil uchta b o 'la k tasm ad an uch b o 'g 'in li yopiq siniq chiziq yasang. Bu shaklni b o sh q ach a nom lan g . U n in g p erim etrin i toping. 4. P erim etri 16 sm b o 'lg a n h ar xil sh ak llar y a sa n g va u lam i nom lang. 5. B ir b o 'la k q o g 'o z v a ra g 'in i oling. U sh b u v araq d an b u k lash y o rd am id a uchbu rch ak yasang. U c h b u rch ak n in g p erim etrin i h iso b lang. 6 . Q o g 'o z v a ra g 'in i b uklash y o rd am id a b esh b u rch ak y a sa n g va hosil b o 'lg a n sh ak ln in g tom onlari uzu n lig in i hisoblang. 7. U zunligi 9 sm b o 'lg a n sim b o 'la g id a n u ch b u rch ak lar yasang. Bu u ch b u rch ak lar tom onlari u zunliklarini topib, ja d v a l tuzing. N a z o r a t u c h u n s a v o l l a r 1. G eo m etrik m aterialni o 'rg a n is h d a q an d ay aso siy m eto d va v o sitalard an foydalaniladi? 2 . O 'q u v c h ila m i g eo m etrik m ateriallar bilan ta n ish tirish g a b a g 'ish la n g a n d arslard an b ir nechatasini ishlab chiqing. 3. 1 -4 -sin f m atem atik a d arslig id a b erilgan g eo m etrik m ateriallar jo y la sh tirilish i h aq id a ijodiy fikrlaringizni yozing. 258 |
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