(100-60-30)×5+(10-6:3):8=

Răspuns :

(100-90)x5 + (10-2):8=
50 + 1 = 51

(100-60-30)×5+(10-6:3):8
=(40-30)×5+(10-2):8
=10×5+8:8
=50+1
=51

Coroana? :)