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[12×5+(3×4-4×2)]+5×4-4×3=


Răspuns :

[ 12 x 5 + ( 3x4 - 4x2) ] + 5x4 - 4x3 =
60 + ( 12 - 8 ) + 20 - 12 =
60 + 4 + 20 - 12 =
84 - 12 = 72.
[12x5+(12-8)]+5x4-4x3=
[12x5+4]+20-12=
(60+4)+20-12=
64+20-12=72