Add and Subtract Fractions Related Worksheets Add and subtract fractions with different denominators. A visual tool to help children to understand how to find a common denominator and then add or subtract fractions. Game Objectives New Maths Curriculum: Year 5: Add and subtract fractions with the same denominator and related fractions; write mathematical statements >1 as a mixed number (e.g. 2/5 + 4/5 = 6/5 = 1 1/5) Year 6: Add and subtract fractions with different denominators and mixed numbers, using the concept of equivalent fractions