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Calculati va rog repede in ordinea invatata:
{[(1+2)x3x4x5:6-7-8]+9}x10=
(9+8-7)x6:(7+8-9)=

Va rog repede dau coroana!!


Răspuns :

{[(1+2)x3x4x5:6-7-8]+9}x10=
=
{[3x3x4x5:6-7-8]+9}x10=
={[180:6-7-8]+9}x10=
={[30-7-8]+9}x10=
=(15+9)x10=
=24x10=240

(9+8-7)x6:(7+8-9)=
=10
x6:6=
=60:6=10