7-sinf matematika I variant

7-sinf matematika
I variant
1. Tenglamani yeching 2,5(2x+3)-2(x+2,5)=3,5+2x
2. Amallarni bajaring _{ }
3. Teng yonli uchburchakning asosi yon tomonidan 3 sm ga katta, lekin yon tomonlari yig’indisidan 5 sm kichik. Uchburchakning tomonlarini toping.
4. Yigindisi 81 ga teng bo’lgan uchta ketma-ket toq sonni toping.
5. Teng yonli uchburchakning perimetri 51 sm ga teng. Asosi yon tomonidan 6 sm uzun. Shu uchburchakning yon tomoni uzunligini toping.

7-sinf matematika
II variant
1. Tenglamani yeching _{ }
2. Amallarni bajaring _{ }

3. ABC teng yonli uchburchakning AB yon tomoniga o’tkazilgan o’rta perpendikulyar BC tomonini D nuqtada kesib o’tadi. Agar ADC uchburchakning perimetri 24 smga teng va AB=16sm bo’lsa, AC asosni toping.

4. Uchta sonning o’rta arifmetigi – 6.5 ga, boshqa ikkita sonning o’rta arifmetigi 8 ga teng. Shu beshta sonning o’rta arifmetigini toping.
5. AB nurda C nuqta, BA nurda B nuqta shunday olinganki, AC=0,7 va BD=2,1. Agar AB=1,5 bo’lsa, CD ni toping.