Respostas

2013-06-05T11:05:58-03:00

p)-28+7+(-12)+(-1)-4-2 =

-28 +7 -12 -1 -4 -2 =

-47 +7 = -40

 

q)-21-7-6-(-15)-2-(-10) =

-34 +15 -2 +10 =

-36 +25 = -11

 

r)10-(-8)+(-9)-(-12)-6+5 =

10 +8 -9 +12 -6 +5 =

35 -15 = 20

 

 

2 5 2
2013-06-05T11:06:48-03:00

p)-28+7+(-12)+(-1)-4-2

   -28+7-12-1-4-2

7-28-12-1-4-2

7-47 = -40

 

q) -21-7-6-(-15)-2-(-10)

    -34+15-2+10

    25-36 = -11

 

r) 10-(-8)+(-9)-(-12)-6+5

   10+8 -9+12-6+5

   10+8+12+5-9-6

35-15 = 20

1 5 1