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6,13+4,34+(-2,13)+5,66+(-13)=?

Răspuns :

= 10,47 - 2,13 + 5,66 - 13 
= 8,43 + 5,66 -13
= 14 - 13 = 1 
[tex]6,13+4,34+(-2,13)+5,66+(-13)= \\ =10,47-2,13+5,66-13= \\ =8,34+5,66-13= \\ =14-13= \\ =\boxed{1}[/tex]