3.3.2 Different Denominators: Make Them Match, Then Add
Core idea1/2 + 1/3 are different sizes and can't just be joined, so turn them into 3/6 + 2/6 = 5/6 first.
Module goal. Add and subtract fractions once the parts match, handling unlike denominators with a common denominator, mixed-number addition and subtraction, and reducing the result.