Respostas

2013-04-10T10:17:49-03:00

a) 24+(-10)= 24-10=14

 

b) 8+6=14

 

c)-72+6=66

 

 

2.(-2)-3.(-2)+1= -2+6+1= 5

 

3.(3)+2.(3)= 9+6= 15