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1+{2-(3-4(+[6+(7-8)+(9-10)]-11}-12
Ajutor


Răspuns :

1+{2-3-4+[6+(7-8)+(9-10)]-11}-12 =

= 1+{2-3-4+[6+(-1)+(-1)] - 11} - 12 =

= 1+[2-3-4+(6 - 1 - 1)- 11] - 12 =

= 1 + ( 2- 3- 4 + 4 - 11) - 12 =

= 1 + (-12) - 12 =

= 1 - 12 - 12 =

= - 11 - 12 =

= - 23