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catalin si sandel au 18 baloane.daca sandel ii da lui catalin 4 baloane,cei doi vor avea acelasi numar de baloane.
Cate baloane are fiecare?


Răspuns :

18÷2=9
9+4=13 baloane sandel
9-4=5 baloane catalin
Sandel are in plus 8 baloane fata de Catalin
c /......./
s /......./...+8
impreuna au 18 baloane
cat reprezinta segmentele egale?
18 - 8 = 10
cat este un segment?
10 : 2 = 5
cate baloane are Catalin?
1 x 5 = 5
cate baloane are Sandel?
5 + 8 = 13