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cum pot sa rezolv ex asta 25+3×[21-(7-7)÷2]÷9

Răspuns :

25+3×[21-(7-7)÷2]÷9=25+3×(21-0÷2)÷9=25+3×(21-0)÷9=25+3×21÷9=25+63÷9=25+7=32 acesta e rez corecta