4-sinf Matematika - Kub mavzuda taqdimot

Mavzu: Kub Kim tez topadi? RASSOM XATOSINI TOPING Matematika 4-sinf Kub 1. Kubni to'g'ri burchakli parallele-piped deb aytish mumkinmi? Tushuntirib bering. Kubning: 8 ta Uchi- Qirrasi - Yoqlari - 12 ta Kubning: 8 ta Uchi- Qirrasi - Yoqlari - 12 ta 6 ta Kubning hamma qirralari bir-biriga teng. Yoqlari esa teng kvadrat-lardan iborat. 2. Simdan kub shakli yasalgan. Ham- masi bo'lib qancha sim ishlatilgan? 12x2=24 dm 3. Qirrasining uzunligi: a) 1 cm; b) 5 cm; d) 4 cm bo'lgan kub sirtining yuzini (hamma yoqlari yuzini) hisoblang. 1) S=1x1=1 kv cm 1 cm 2) 1x6=6 kv cm 3. Qirrasining uzunligi: a) 1 cm; b) 5 cm; d) 4 cm bo'lgan kub sirtining yuzini (hamma yoqlari yuzini) hisoblang. 1) S=5x5=25 kv cm 5 cm 2) 25x6=150 kv cm 3. Qirrasining uzunligi: a) 1 cm; b) 5 cm; d) 4 cm bo'lgan kub sirtining yuzini (hamma yoqlari yuzini) hisoblang. 1) S=4x4=16 kv cm 4 cm 2) 16x6=96 kv cm 4-masala 1 ) Aeroportdan bir vaqtda ikkita samolyot qarama-qarshi tomonga qarab uchib ketdi. 10 minutdan keyin ular orasidagi masofa 270 km bo'ldi. Agar 1 - samolyotning tezligi 15 kmmin bo'lsa, 2- samolyotning tezligini toping. 270 km 10 min 15kmmin ?kmmin yechish: 1)270:10=27kmmin 2)27-15=12kmmin 1-usul 2-usul 1)15x10=150 km 2)270-150=120km 3) 120:10=12kmmin Javob: 12 kmmin 4-masala 2) 600 : 6 - 55 ifodaga ko'ra yuqoridagiga o'xshash masala tuzing. 600 km 6min 55kmmin ?kmmin yechish: 1)600:6=100 kmmin 2)100-55=45kmmin 1-usul 2-usul 1)55x6=330 km 2)600-330=270km 3) 270:6=45kmmin Javob: 45 kmmin Uy ga vazifa: 5-6-misol, masalalar 5-misol 6-masala. Agar motosikl ...