45-dars 5-sinf Sana: 20 y

Tashkiliy qism:

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

Asosiy qism:
Biror shaklning hajmini o’lchash deganda bu shaklga birlik kubdan nechtasini joylash mumkinligini aniqlashga aytiladi.
To’g’ri burchakli parallelopipedning hajmi bo’yi, eni va balandligi ko’paytmasiga teng. Ya’ni V=SH=abc.
Qirrasi a ga teng bo’lgan kubning hajmi V=a³ formula bilan ifodalanadi.
Hajm o’lchov birliklari:
1 litr=1 dm³; 1 m³=1000 dm³; 1 dm³=1000 sm³;
1 m³=1000000 sm³; 1 km³=1000000000 m³
2-misol.
a) a=12 sm; b=15 sm; c=8 sm; V-?
Yechish:
V=abc=12∙15∙8=180∙8=1440
b) a=18 sm; b=9 sm; c=12 sm; V-?
Yechish: V=abc=18∙9∙12=1944.
Mustahkamlash:
3-misol.
V=1 m³; m=1290 g; a=8 m; b=6 m; c=3 m
Yechish: V=abc=8∙6∙3=144 m³; m=144∙1290= 185760 g=185 kg 760 g
4-misol.
a) S=15; H=4; V-? Yechish: V=SH=15∙4=60
b) S=36; H=2; V-? Yechish: V=SH=36∙2=72
5-misol.
a=24; b=13; V=3432; c-?
Yechish: V=abc c=V:ab=3432:(24∙13)=11


Baholash:
Uyga vazifa: 16-17 misol.
O`IBDO`: ______________ G.Xo’jayeva
71-dars 5-sinf Sana: __ __ 20__y.

Mavzu: Misollar yechish.