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1. The addition (sum) of any two integers is always an integer.

ii) (- 3) + 8 = 5

iii) (- 3) + (- 8) = -11

iv) 3 + (- 8) = - 5 and so on.

2

ii) (- 8) + (+ 4) = (+ 4) + (- 8)

iii)(- 6) + (- 5) = (- 5) + (- 6) and so on.

3. For any three integers ‘a’, ‘b’ and ‘c’. a + (b + c) = (a + b) + c

ii) 18 + [(- 5) + (- 12)] = [18 + (- 5) + (- 12)] and so on.

i)(+ 5) + 0 = 0 + (+ 5) = + 5

ii) (- 13) + 0 = 0 + (- 13) = - 13 and so on.

5. The sum of an integer and its negative is always zero. i.e., a + (- a) = 0

ii) (- 9) + 9 = 0 and so on.