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Calculati : [(20+3x14)x5-6x5]x2-400

Răspuns :

3x14=42
20+42=62
62x5=310
6x5=30
310-30=280
280x2=560
560-400=160
|(20+3x14)x5-6x5|x2-400=
|(20+42)x5-6x5|x2-400=
(62x5-6x5)x2-400=
=(310-30)x2-400=
=280x2-400=
=560-400=
=-160