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3+3×[3+3:3×(3+3×3)]:15=

Răspuns :

= 3+3x[3+1x(3+9)]:15 = 3+3x[3+12]:15= 3+3x15:15=3+3=6
3+3×[3+3:3×(3+3×3)]:15=
=3+3×[3+1×(3+9)]:15
=3+3×(3+12):15
=3+3×15:15
=3+3
=6