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Rezolvati exercitiul prin 2 moduri:
(5+4)x7=?



Răspuns :


(5+4)x7=

=9x7=63

(5+4)x7=

=(7x5)+(7x4)=

=35+28=63

(5*4)*7=9*7=63
(5+4)*7=(7*5)+(7*4)=35+28=63