تصحيح

2

          3  (-9) ÷ (-3)  =                   

            -8 ÷ 4x 2 =-8 : 8

                           = -1

           (-1) x27 ÷ 9 x(-3)= -27 : (-27)

                                                                = 1                                                    

3

(-5)×(+7) = - 35

(-24)÷(+8) = - 3

-1000÷100 = - 10

  =    1

=    -  19

  =    - 4

   = 5

  =  0

   = 2