Which statement best explains why the expression is equal to 6.5m? 3.25h + 6.5m – 3.25h. 3.25 is half of 6.5, so the two 3.25's will cancel out the 6.5. The sum of a number and its opposite is 0, and the sum of any number and 0 is the number itself. When h = 0, the first and last terms are zero, so the result is 6.5m. The sum of a number and its opposite is 1, and the product of any number and 1 is the number itself.