What term describes the total number that results when adding fractions with a common denominator?

The correct term for the total number that results when adding fractions with a common denominator is "Fraction Addition." When you add fractions that share a common denominator, you combine the numerators while keeping the denominator the same. This process is straightforward because the common denominator ensures that the fractions represent parts of the same whole. For example, if you are adding 1/4 and 2/4, you add the numerators (1 + 2) to get 3, and the denominator remains 4, resulting in 3/4. This operation is foundational in fractions and is essential for understanding how to work with them effectively in various mathematical contexts.

The other choices refer to different concepts: Fraction Subtraction refers to taking one fraction away from another, Mixed Number denotes a whole number combined with a fraction, and Decimal Place Value pertains to the value of digits in a decimal number. Each of these describes different operations or types of numbers, but they do not apply to the process of adding fractions with a common denominator.