Sonli va harfli ifodalar Dars maqsadi: ta’limiy maqsad

+13924=18100+13924=32024

№186

To’g’ri to’rtburchak shaklidagi maktab hovlisining bo’yi 216 m, eni esa bo’yidan 45 m qisqa. Maktab hovlisining perimetrini hisoblang.

Javob:

Maktab hovlisining perimetri 774 m ekan.

Berilgan: Bo’yi__ 216 m

Eni____ ? ,45 m qisqa

Perimetri- ? m

Yechish:

• 
  216-45=171 (m) eni
  Formula:
  
  P=(bo’yi+eni)∙2
  
  2) P=(216+171) ∙2=774 (m)
  

№187 “Lacetti” avtomobili massasi 1246 kg, “Cobalt” avtomobili massasi esa 1149 kg. “Cobalt” avtomobili “Lacetti” avtomobilidan necha kilogrammga yengil?

Berilgan: “Lacetti” avtomobili-1246 kg

“Cobalt” avtomobili-1149 kg ?kg yengil

Yechish:

• 
  1246-1149=97 (kg) yengil
  

  Javob:

  “Cobalt” avtomobili “Lacetti” avtomobilidan

  97 kgga yengil.

II.O’tilgan mavzuni so’rash:

“Kim topqir?” o’yini

1) 427 sonining 52 ta kamidan 90 ta ortiq sonni toping.

2) 6714 sonining 714 ta kamidan 500 ta ortiq sonni toping.

3) 100 sonining 22 ta ortig’idan 55 ta ortiq sonni toping.

4) 7458 sonining 64 ta kamidan 90 ta kam sonni toping.

5) 605 sonining 89 ta kamidan 987 ta ortiq sonni toping.

1) (427-52)+90=375+90=465

2) (6714-714)+500=6500

3) (100+22)+55=177

4) (7458-64)-90=

=7394-90=7304

5) (605-89)+987=516+987=1503

Mavzu:Sonli va harfli ifodalar.

6 sm

6 sm
Sonlar, arifmetik amallar va qavslardan tuzilgan ifodalar sonli ifodalar deyiladi.