Răspuns:
..3 cornuri.......5 pâini.......2300g
4 cornuri.........2 pâini.......1200 G
1 corn +1 pâine.....= ? g
3 cornuri........5 pâini......2300 g /×4
4 cornuri......2 pâini......1200 g /×3
12 cornuri.....20 pâini......9200 g
12 cornuri......6 pâini......3600 g
0 cornuri......14 pâini.....5600 g
20-6=14 pâini
9200-3600=5600 g (au 14 pâini)
5600 ÷14=400 g o pâine
2×400=800 g (2 pâini)
1200-800=400 g (4 cornuri)
400÷ 4= 100 g (un corn)