45-dars 5-sinf Sana: 20 y

Asosiy qism:
12-misol.
a) a=40; b=30; c=40; V-? Yechish:V=abc=40∙30∙40=64000 sm³=64 litr
b) a=60; b=40; c=40; V-? Yechish:V=abc=60∙40∙40=96000 sm³=96 litr
13-misol.
a) a=3 m; b=6 m; c=3 m; S-?
Yechish: S=ab=3∙6=18 m²
b) a=5 m; b=3 m; c=4 m; S-?
Yechish: S=ab=5∙3=15 m²
d) a=8 m; b=5 m; c=4 m; S-?
Yechish: S=ab=8∙5=40 m²
Mustahkamlash:
14-misol.
a) a=4 dm; b=7 dm; c=4 dm; V-?; S-?
Yechish: S=2∙(ab+bc+ac)=2∙(4∙7+7∙4+4∙4)=2∙(28+28+16)=2∙72=144 dm²
V=abc=4∙7∙4=28∙4=112 dm³
b) a=12 dm; b=20 dm; c=18 dm; d=20 dm; e=9 dm; 10 dm; S-? V-?
Yechish: S=S₁+S₂=2∙(12∙20+20∙18+12∙18)+2∙(20∙9+9∙10+20∙10)=2∙(240+360+216)+
+2∙(180+90+200)=2∙816+2∙470=2∙(816+470)=2∙1286=2572
V=V₁+V₂=12∙20∙18+20∙9∙10=4320+1800=6120
d) a₁=12; b₁=20; c₁=2; a₂=12; b₂=8; c₂=2; S-? V-?
Yechish: S=S₁-S₂=2∙(12∙20+20∙2+12∙2)-2∙(12∙8+8∙2+12∙2)=2∙(240+40+24)-2∙(96+16+24)=
=2∙304-2∙136=2∙168=336
V=V₁-V₂=12∙20∙2-12∙8∙2=24∙20-24∙8=24∙12=268


Baholash:
Uyga vazifa: 20-21 misol.
O`IBDO`: ______________ G.Xo’jayeva
73-dars 5-sinf Sana: __ __ 20__y.

Mavzu:Nazorat ishi 6.

Mavzuga oid tayanch tushunchalar:bo’lish,ko’paytirish,taqqoslash belgilari,to’g’ri chiziq,matematik amallar,kesma,chizg’ich,o’lchov birliklari. Soatlar soni: 1 soat