I bob. Natural sonlar va shkalalar 1. Natural son tushunchasi. Natural sonlarning yozilishi va o‘qilishi...................5
2. Kesma. Kesmaning uzunligi. Uchburchak.....................................................11
3. Tekislik, to‘g‘ri chiziq va nur..........................................................................17
4. Shkalalar va koordinatalar. Sonlar nuri.........................................................20
5. Natural sonlarni taqqoslash. Katta va kichik.................................................28
6. I bobni takrorlashga doir masalalar...............................................................32