A way to address this is to learn how to compare fractions and find common denominators so that two fractions can be numerically compared clearly. The worksheets on this page provide exercises to do exactly that, and they are good practice for the steps necessary for other fraction operations.
Students definitely grasp the lessons easier when their studies are combined with games. These methods are ideal if you find it difficult to add large numbers. Students studying at advanced level may also find these methods helpful and improve their addition skills. These games can also be adapted to most math skills. The games are fun and students forget they are learning.