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vrem sa aranjam 457 de oua in cartoane de cate 30 oua . de cate cartoane avem nevoie si cate oua vor fi in ultimul caton ?

Răspuns :

457:30=15
15×30=450 oua in cele 15 cutii
457-450=7 oua in ultima cutie
Cate cofraje ?
457 : 30  = 15 cofraje pline, raman 7 oua in cofrajul 16