Respostas

2013-06-05T10:11:31-03:00

e)(+9)-(-2)+(-1)-(-3) =

+9 +2 -1 +3 =

14 -1 = 13

          

f)9-(-7)-11 =

9 +7 -11 =

16 -11 = 5  

 

g)-2+(-1)-6 =

-2 -1 -6 = -9

 

h)-(+7)-4-12 =

-7 -4 -12 = -23

 

i)15-(+9)-(-2) =

15 -9 +2 =

17 -9 = 12

1 5 1
2013-06-05T10:53:05-03:00

e)(+9)-(-2)+(-1)-(-3)

9+2-1+3=13

 

 f)9-(-7)-11    

9+7-11

=5

 

 g)-2+(-1)-6

-2-1-6=-9

 

 h)-(+7)-4-12

-7-4-12=-23

 

 i)15-(+9)-(-2)

15-9+2=8