3+3×[3+3:3×(3+3×3)]:15

Răspuns :

3+3•[3+3:3•(3+9)]:15 =

= 3 + 3•(3 + 3 : 3•12) :15 =

= 3 + 3•(3 + 1•12) :15 =

= 3 + 3•(3 + 12) :15 =

= 3 + 3•15:15 =

= 3 + 75:15 =

= 3 + 3 =

= 6