Answer:

1.      True

Example:   2 + 3 = 5 and

                       3 + 2 = 5 

      Addition is commutative.

2.      False

Example:   (2 – 5) – 3 = -6 and

                       2 – (5 – 3) = 0

      Subtraction is not associative.

3.      False

Example:   12 ÷ 2 = 6 and

                       2 ÷ 12 = 1/6

      Division is not commutative.        

4.      False

Example:   5 – 2 = 3 and

                 2 – 5 = -3

Subtraction is not commutative.