Mavzu: Nisbat va proporsiya

Og’zaki so’rov:

1.Proporsiya deb nimaga aytiladi? Misollar keltiring.

2. Biror misolda proporsiyaning o’rta va chetki hadlarini k’orsating.

3. Proporsiyaning asosiy xossasini ayting.

4. Proporsiyani yechish deganda nimani tushunasiz?

5. Nisbat deganda nimani tushunasiz?

6. Nisbatning hadlarini ayting. Misollarda tushuntiring.

7. Nisbatning xossalarini ayting. Misollarda tushuntiring.

         Jadvalni to’ldiring:

Proporsiya	=	=	=	=	=
O’rta hadlari
Chetki hadlari

         Javobi

Proporsiya	=	=	=	=	=
O’rta hadlari	b va c	c va b	a va d	d va a	b va c
Chetki hadlari	a va d	a va d	b va c	b va c	d va a

 

 Misollar yechish:

606-misol. Proporsiyaning noma’lum hadini toping.

a)X : 18 = 68 : 17              b) 18 : 5 = 72 : X           d) 28 : X = 7 : 9

   X ∙ 17 = 68 ∙ 18                   X ∙ 18 = 72 ∙ 5               X ∙ 7 = 28 ∙ 9

   X = 1224 : 17                      X = 360 : 18                 X = 252 : 7

   X = 72                                 X = 20                           X = 36

  607-misol. Tenglamani yeching.

a)  =                               b)  =                         d)  =

    3X ∙ 20 = 9 ∙ 4                       7X ∙ 24 = 35 ∙ 8             2X ∙ 52 = 13 ∙ 18

   X = 36 : 20 : 3                      X = 280 : 24 : 7             X = 234 : 52 : 2

   X = 0,6                                    X =                                 X = 2,25

Yakuniy qism: Dars o’qituvchi tomonidan xulosalanadi. Darsda faol qatnashgan o’quvchilar baholanadi.

 Uyga vazifa: Mavzuni o’rganish, masalalar yechish, savollarga javob      yozish.

O’.I.B.D.O’ :