Yes, you can.
Rational and Irrational Numbers
The result will also be a rational number.
You can not add irrational numbers. You can round off irrational numbers and then add them but in the process of rounding off the numbers, you make them rational. Then the sum becomes rational.
All fractions are rational numbers because irrational numbers can't be expressed as fractions
Yes, you can.
Rational and Irrational Numbers
Every time. The sum of two rational numbers MUST be a rational number.
Add them together and divide by 2 will give one of the rational numbers between two given rational numbers.
The result will also be a rational number.
If you add, subtract or multiply rational numbers, the result will be a rational number. It will also be so if you divide by a non-zero rational number. But division by zero is not defined.
No. The set of rational numbers is closed under addition (and multiplication).
Another rational number.
no
You can not add irrational numbers. You can round off irrational numbers and then add them but in the process of rounding off the numbers, you make them rational. Then the sum becomes rational.
no
If the two rational numbers are expressed as p/q and r/s, then their sum is (ps + rq)/(qs)