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1+3x[7+8x7-3+3x(5+6)]

[55x5-(199-99x2+2Ox5)+22O:10]:4

5+[7+3x(7-2)]:2-6

9+8x[7+6x(5+4x3)-2x1]-10x10

Dau coroana!


Răspuns :

1+3x[7+8x7-3+3x(5+6)]=
1+3x[7+56-3+33]=
1+3x93=1+279=280
 [55x5-(199-99x2+20x5)+220:10]:4=
[275-(199-198+100)+22]:4=
[275-101+22]:4=
196:4=49

5+[7+3x(7-2)]:2-6=
5+[7+15]:2-6=
5+22:2-6=
5+11-6=10

9+8x[7+6x(5+4x30-2x1]-10x10=
9+8x[7+6x(5+120-2]-100=
9+8x[7+6x123]-100=
9+8x745-100=
9+5960-100=5869