True or false?
1. all real numbers are either rational or irrational?
2. every real number can be represented as a decimal, and every decimal represents a real number?

"Every real number can be represented as a decimal, and every decimal represents a real number"
 
Every real number can be represented as a decimal --> True since non-terminating decimals are decimals too.
 
And every decimal represents a real number --> This is just the vice versa of the first statement. Hence true.
 
That's making the whole statement true. So both the statements are true.