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calculeaza in doua moduri (15+15):3= si (18+27):5=

Răspuns :

Modul 1) Calculam pas cu pas :
30:3 = 10
45:5 = 9

Modul 2) Desfacem parantezele (aplicam distributivitatea) :
15:3+15:3=5+5 = 10
18:5 + 27:5 = 3,6+5,4 = 9