efectueaxa [(6*2:2-0:12):1+9:3]×6-24

Răspuns :

[(6 x 2 : 2 - 0 : 12) : 1+ 9 : 3] × 6 - 24 =
=
[(12 : 2 - 0 ) : 1+ 9 : 3] × 6 - 24 =
= [(6 - 0 ) : 1+ 9 : 3] × 6 - 24 =
= (6 : 1+ 9 : 3) × 6 - 24 =
= (6 + 3) × 6 - 24 =
= 9 × 6 - 24 =
= 54 - 24 =
= 30