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Ce numere se rotunjesc la 30? Multumesc



Răspuns :

Prin adaos: 25, 26,27, 28, 29. (prin adaugare)
Prin lipsa: 31, 32, 33, 34.
la 30 se rotunjesc numerele:      25,26,27,28,29,30,31,32,33,34,35.  tot ce trece peste 35 se rotunjeste la 40.