ADIÇÃO E SUBTRAÇÃO DE INTEIROS

 $-6\ +\ 8\ =\ ?$  

• –2
  

• 2

• –14

• 14

 $12\ -20\ =\ ?$  

• 32

• –32

• –8

• 8

 $-12\ -2\ =\ ?$  

• 10

• –10

• 14

• –14

 $-10\ +15\ \ =\ ?$  

• 5

• –5

• –25

• 25

 $7\ -\ 12\ \ =\ ?$  

• 5

• –5

• –19

• 19

 $-5\ +\ 2\ -1\ =\ ?$  

• –2

• –4

• –6
  

• –8

 $-7\ -\ 2\ -5\ =\ ?$  

• 13

• –13

• 14

• –14

 $6\ -10\ +\ 5\ =\ ?$  

• 1

• –1

• –9
  

• –11

 $-\ 2\ -3\ +\ 5\ =\ ?$  

• –1

• 0

• 1
  

• 2

 $-16\ +\ 25\ -\ 5\ -\ 20\ +\ 6\ =\ ?$  

• –11
  

• –10

• –9
  

• –8