plus

on the positive side or higher end of a scale

• “a plus value”
• “temperature of plus 5 degrees”
• “a grade of C plus”

involving advantage or good

• “a plus (or positive) factor”

a useful or valuable quality

the arithmetic operation of summing; calculating the sum of two or more numbers

• “the summation of four and three gives seven”
• “four plus three equals seven”