Respostas

2013-06-04T11:17:44-03:00

Sinais diferentes +-=- / ++=+/--=- enfim

1.65+(-3.5)-(+2)= -3.85

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2013-06-04T11:18:10-03:00

1,65-3,5=3,50-1,65=-1,85+2=2,00-1,85=0,15

 

 

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