Chapter R - Section R.2 - Operations on Real Numbers - R.2 Exercises - Page 19: 1

Positive

The sum of two positive numbers is a positive number. When we add together two numbers with the same sign, we are adding their absolute values. The sum will have the same sign as the given numbers, which is positive in this case. For example, $6+3=|6+3|=|9|=9(\gt0)$