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transforme les soustract0in en addition pui calcule les en les regroupent jariive pa e=  (+12)-(-6)+(-2)+(+7)-(+8) aidee moi

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SAMUEL84390

e= (+12) + (+6)+(-2) + (+7)+(-8) =15

 (+12)-(-6)+(-2)+(+7)-(+8)=12+6+(-2)+7+(-8)

                                        =25+(-10)

                                        =15

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