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OANA,MARIA SI ANDREI AU 33 DE CASTANE.OANA ARE 8 CASTANE.ANDREI ARE CU 5 CASTANE MAI MULTE DECAT MARIA .CATE CASTANE ARE FIECARE.

Răspuns :

Oana are 8 castane

Andrei are 8 + 5 = 13 castane

Maria are 33 - 13 - 8 = 20 - 8 = 12 castane

12 castane 20-8=12 castane