1. Always true. 1+1=2 2. Always true. 1+e is irrational. 3. Sometimes true. e + (-e) = 0 which is rational. 4. Always true. 1*1 = 1 5. Sometimes true. 0*e = 0 which is rational. 6. Sometimes true. Sqrt(2) * sqrt(2) = 2 which is rational.
The question asked for an example to support your answer, but none of the answers can be proven with just one example. The answers which are sometimes true need 2 examples to be proven, and the answers which are always true cannot be proven by example.
