2. Shunday kvadrat chizing va uning perimetrini toping:
3.
39 + 1=40
86 – 3 4=52
9 + 4=13
56 – 6 =50
42 + 8 =50
8 + 3=11
23 + 7 =30
74 + 6 =80
7 + 5=12
IV. Yangi mavzuni mustahkamlash:
4. Sirk tomoshasida 9 ta ot va 8 ta kuchukcha qat nashdi. Tomoshada
hammasi
bo‘lib nechta uy hayvoni qatnashgan?
Yechish: 1) 9+8=17
Javob: 17 ta uy hayvoni qatnashgan
5. Misollarni qulay usul bilan hisoblang:
1) 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9;
Namuna: 1 + 9 = 10
Yechish: 1) 1+9=10
2+8=10
3+7=10
4+6=10
Bitta 5 soniga sherik yo’qligi uchun o’zi qoldi:
2) 10+10+10+5=40+5=45
Javob: 45
2) 2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18;
Namuna: 2 + 18 = 20
Yechish:1) 2+18=20
4+16=20
6+14=20
8+12=20 Bitta 10 soniga sherik qolmadi:
2) 20+20+20+20+10=80+10=90
Dostları ilə paylaş: