( - 70 ) x ( -35 ) x 0 x ( - 63 ) = 

7, 3, -1, -5, -9, -13, ----------.

(-57) × (-29) + 50 = ____________.

Additive identity is

Adding 23 to a number we get -143 .Which is the number ?

(-30) x [(13 + (-3)] = 

Additive inverse of  -7 is 

7 x 1 = 1 x 7 = 7.  State the property used here.

a - (-b) =_____________ if the value of a = 21, b = 18.

__________ is neither positive nor negative.