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completeaza cu (:-+x) 90 9. 10. 100. 1 =0

Răspuns :

    
[tex] -90:9*10 :100+1=0 \\ \\ Verificare: \\ -90:9*10 :100+1= \\ =-10*10 :100+1= \\ =-100 :100+1=-1+1=\boxed{0}[/tex]