Completing your homework is one thing, studying it is another. Studying will have you testing yourself as you read the material. Studying will fill your memory with facts, with answers. Studying will give you better grades.
Practice is essential to success. Practice is like adding brick to a brick wall, it creates and builds and strengthens. By practice you develop and build skills. Professionals are professionals because they have practiced, practiced, practiced. Practice is essential to success. Want to be good at math? Practice. Work at it.
The difference between winning and losing is practice. The more practice there is, the better the results there will be. Practice makes perfect.