5+7 = 2+10 = 12
3+12 = 5+10=15
Aplica esta propriedade nas seguintes operações:
6+8= ______________________________________________________
____________________________________________________________
2+9=_______________________________________________________
____________________________________________________________
8+11=_______________________________________________________
____________________________________________________________
6+13=_______________________________________________________
____________________________________________________________
2. Observa as seguintes figuras. O que verificas?
3+12 = 5+10=15
Aplica esta propriedade nas seguintes operações:
6+8= ______________________________________________________
____________________________________________________________
2+9=_______________________________________________________
____________________________________________________________
8+11=_______________________________________________________
____________________________________________________________
6+13=_______________________________________________________
____________________________________________________________
2. Observa as seguintes figuras. O que verificas?
12-4= 10-4+2 = 6+2= 8
Aplica esta propriedade nas seguintes operações:
12-5=_______________________________________________________
____________________________________________________________
13-4=_______________________________________________________
____________________________________________________________
15-6=_______________________________________________________
____________________________________________________________
18-9=________________________________________________________
____________________________________________________________