40-20+50=, 90-30+20=, 50-20+30=, 40+50-60=, 30+50-40=, 30+40-20=, 20+40+30=.

Ilg'orlar ro'yxati

Vizual uslub

Moslamalar

Namunani almashtirish

Tahrirlashni davom ettirish: ?