Propriedades da Adição

Propriedades da Adição

  

Selecciona a opção correcta de acordo com a respectiva propriedade da adição.

10+2,5=2,5+10
(12,5+4,7)+7,8=12,5+(4,7+7,8)
34,7+45=45+34,7
(4+2)+6,3=4+(2+6,3)
8,1+0=8,1
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