Boshlang'ich sinflarda matematika o'qitish metodikasi
Download 7.79 Mb. Pdf ko'rish
|
8boshsinfmatematikapdf
- Bu sahifa navigatsiya:
- S o d d a t e n g la m a la m i y e c h ish
x
harfi b ilan belg i- laym an. 12 ta o lm a b o r edi, x ta olm a y eild i, 7 ta o lm a q oldi, te n g la m ani yozam an: 11 - x = 7". K o ’pay tirish v a b o ’lish am allarin in g n o m a ’lum k o m p o n en tlarin i to p ish g a d o ir m asalalar aso san ab strak t shaklda beriladi. M asalan: “o ’y lan g an sonni 3 g a k o ’pay tirib , 18 h o sil qilish ad i. Q an d ay son o ’y lan g an ?" U chinchi sinfda n o m a ’lum k o m p o n en tlam i to p ish g a d o ir sod d a m asalalam i y ech ish m alakasi m u stah k am lan ad i. B unda o ’q u v c h ila r ayirm a yoki n isb at tu sh u n ch asi b ilan b o g i i q b o ’lgan so d d a m asalalar y ech ish n in g alg eb raik usuli b ilan birin ch i m arta ta n ishadilar. M u rak k ab m asalalam i alg eb raik usul b ilan y e ch ish aso san u chunchi sin fd an b o sh lab k iritiladi. U chinchi sinfda te n g lam alar tu zish y o ’li bilan m a salalam in g b ir nech a xili yechiladi. o ’q u v c h ila r q u y id ag i m a salalam iten g lam alar tuzib y echishni o ’rganadilar. 1. “A g a r o ’ylan g an sonni 3 m arta va 15 m arta o rttirilsa, 75 hosil b o ’ladi. Q an d ay son o ’y lan g an ?” 2. “ B ola 3 ta q alam va 28 so ’m tu rad ig an k ito b g a 4 0 s o ’m to ’ladi. 1 ta q alam n ech a so ’m tu ra d i? ” va hokazo. S o d d a t e n g la m a la m i y e c h ish A m al hadlaridan biri o ’zgaruvchi b o ’lgan x + 17 = 27; 20 + x = 29; x - 16 = 1 0 v a 2 5 - x = 19 kabi tengliklar tenglam a deyiladi. 236 T englam ani yechish uchun n o m a’lum hadning son qiym atini topish kerak. B uning uchun q o ‘shish va ayirishni tekshirish qoidasidan foy dalaniladi. 1. Q u y id ag ilam in g to ‘g lriligini tekshiring. 71 + 19 = 9 014 + 61 = 7 5 9 3 - 2 3 = 70 58 + 22 = 8 0 4 9 - 1 8 = 3161 - 4 0 = 21 2. Q uyidagi ten g lam alam i yech ib tekshiring. 63 - u = 4023 + x = 6 9 u + 26 = 50 39 + x = 6074 - u = 52Z - 30 = 65 3. M iso llarn i u stun sh ak lid a y o zib yeching. 28 + 4 5 8 0 - 6723 + 3798 - 74 49 + 2 7 9 0 - 5 3 4 6 + 3 1 7 6 - 5 5 55 + 2 770 - 4 5 8 0 - 6749 + 30 4. B irlik v a o ‘n lik lar x onasidagi ra q am lar y ig ‘indisi 4 g a teng boMgan b arch a ikki xonali so n lam i yozing. 5. M a sa la la m i ten g lam a tuzib yeching. a) K arim o ‘zidagi q u y o n lam in g 25 tasini sotg an d an k e y in o ‘zida 4 0 ta quy o n qoldi. K arim n in g quyonlari n ech ta boN gan? b) Sobiijonda 43 ta kanareyka bor edi. U bir nechta kanareykani sot gandan keyin o lzida 20 ta kanoreyka qoldi? N echta kanoreyka sotilgan? d ) S o b irjo n yan a b ir n ech ta t o ‘ti so tib o lg an d an keyin qushlari 66 ta boNdi. U n ech ta to ‘ti sotib olgan? S o n li te n g s iz lik la r v a u la r n i y e c h ish 1. B ir katakni b ir b irlik deb q u y id ag i so n lam i so n tu rid a belg i- lang: a) 1; 3; 4 ; 6 ; 9; 12; 8 ; 10. b) 2; 5; 6 ; 8 ; 10; 13. 2 . 2s • 80 tiy 20 + 7 - 3 0 - 3 25 sm • 3 d m 2 7 - 7 - 16 + 4 10 d m - 15 sm 91 - 4 0 - 4 0 + 9 3. 50 + 2 4 - 7 1 5 + 23 - 8 4 5 + 4 0 - 4 4 4 + 4 4 - 926 + 24 + 4 3 4 + 2 3 - 9 22 + 22 - 1223 + 23 + 7 7 3 - 14 + 9 237 4. Ish o ralam i to ‘g ‘ri q o ‘ying: 3 - 5 - 8 = 166 • 6 - 7 = 5 7 - 5 • 5 = 7 1 4 - 5 - 1 0 = 1 9 6 • 3 • 8 = 1145 - 2 0 - 10 = 15 5. Q av sla m i to ‘g ‘ri q o ‘ying: 7 3 - 1 4 + 9 = 5018 + 5 0 - 2 5 = 43 61 + 3 4 - 2 9 = 6 6 8 4 - 3 0 - 2 4 = 30 19 + 84 - 23 = 8 079 - 39 - 2 0 = 60 6 . M u n o sab at b elg ilarin i to ‘g ‘ri q o ‘ying: 83 - 23 • 38 + 2219 + 2 0 - 5 2 - 13 5 6 - 1 2 - 2 4 + 2527 + 31 - 8 0 - 1 1 37 + 5 2 - 3 5 + 5524 + 2 3 - 6 0 - 14 7. D arch alam i yoping: 24 + 26 > ’74 - 13 < ’ 33 + 4 0 > ’99 - 34 < ’ 5 0 + 36 > ’5 6 + 19 < ’ Q a v sli ifo d a la r n in g q iy m a tin i h iso b la sh Q av ssiz ifodalarda faqat q o ’sh ish v a ay irish am allari q atn ash sa, b o sh id an b oshlab tartib b ilan ishlanaveradi. A g ar qavs q atn ash sa, a v val qavs ichidagi am al keyin b o sh q a am allar bajariladi. 41 - ( 9 + 6 ) 7 6 - ( 3 0 + 1 7 ) 6 3 - ( 1 9 + 17) 76 - (17 + 8)80 - (42 - 16)54 + (60 - 32) 63 + (4 0 - 2 6)48 + (35 - 13)89 - (8 4 - 45) 50 + (14 + 23)2 8 + (70 - 51)9 4 - (21 + 32) 50 - (28 - 13)30 + (15 + 23)8 9 - (17 + 23) 73 - (35 - 18)96 - (64 - 23)7 8 - (3 4 + 9) 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 a) K v adratdagi sonlarni d iag o n allar b o ’yich a, u stu n lar b o ’y ic h a v a b u rch ak d an -b u rch ak k a q arab q o ’shg an d a b ir xil so n ch iq ay ap ti. T ek sh irib k o ’ring, to ‘g ‘rim i? 238 b) Shu qo iu aiard an lo y a a la n ib , ushbu k v a d ratlam in g icataklariga y e tish m ag an so n lam i q o ‘yib chiqing: 2 4 6 8 14 22 26 28 32 38 4. N arg iza 100 dan 27 ni ayirdi, so ‘ngra 18 n i ayirdi va y an a b ir sonni ay irg an edi 39 qoldi. N arg iza e n g k ey in qaysi sonni ay irg an ? Download 7.79 Mb. Do'stlaringiz bilan baham: |
Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling
ma'muriyatiga murojaat qiling