7-sinf. Algebra Sana: 1-Mavzu: 5- va 6-sinfda o’tilganlarni takrorlash Darsning maqsadi

Darsda foydalanilgan metodlar: an’anaviy, interfaol

Dars jihozi: darslik, konspekt, ko’rgazmali qurollar, tarqatma materiallar

Tashkiliy qism:

1. 
   Salomlashish
   
2. 
   Navbatchi axborotini tinglash
   
3. 
   O’tilgan mavzular yuzasidan savol-javob o’tkazish
   
4. 
   Uy vazifasini tekshirish
   

Asosiy qism

Algebraik ifoda sonlar va xarflardan tuzilib, amal belgilari bilan birlashtirilgan ifodadir. Agar algebraik ifodaga kirgan xarflar o’rniga biror son qo’yilsa va ko’rsatilgan amallar bajarilsa, natijada hosil qilingan son algebraik ifodaning son qiymati deyiladi.

10-masala.
1) 3a-2b, a=1/3, b=1 3∙1/3-2∙1=-1 2) 2a+3b; a=3; b=-2 2∙3+3∙(-2)=0

3 ) 0,25a-4c²; a=4; c=3 0,25∙4-4∙3²=1-36=-35 4) 2a²-(1/3)b; a=2; b=9 2∙4-(1/3)∙9=5

11-masala.


Mustahkamlash
12-masala.

1 soatda 7 t; m soatda 7 m; 24∙7=168

13-masala

1) 60m 2) 60:p 3) 60m+1+60:p

14-masala. 1) x=-0,37; y=-0,42; 3∙(-0,37-(-0,42))=3∙0,05=0,15

2) x=-2,98; y=-4,48; 3∙(-2,98-(-4,48))=3∙(4,48-2,98)=3∙150=450

3)

4)