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calculeaza in doua moduri dupa model

Calculeaza In Doua Moduri Dupa Model class=

Răspuns :

(3+4)×9=7×9=63
(3+4)×9=3×9+4×9=27+36=63

7×(10-6)=7×10-7×6=70-42=28
7×(10-6)=7×4=28

sper ca ai inteles