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Gio25
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produsul a trei factori este 81 . al treilea factor este de 3 ori mai mare decat fiecare dintre ceilalti doi . reconstitue inmultirea . va rog . prin metoda figurativa

Răspuns :

Fabianmoldovean

/ ____/_____/_____/                                                                                                   81*3=243 (al doilea factor)                                                                              243*3=729                                                                                                                 729:3=243

243:3=81

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