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13-3×[7-2×(5-3)] efectuati

Răspuns :

13-3×[7-2×(5-3)]=
13-3×(7-2×2)=
13-3×(7-4)=
13-3×3=
13-9=
4
13-3[7-2(5-3)]=
13-3(7-2×2)=
13-3(7-4)=
13-3×3=13-9=4