Math practice guide
When to Practice One Skill—and When to Mix Them
Use a single-skill worksheet when you want to work on one method. Mix skills when choosing the right method is part of the practice.
Last reviewed 2026-08-07.
Use one skill for one method
A worksheet of addition problems lets you work on addition. Keep the mathematical decision consistent while a method or representation is new.
Mix skills to practice choosing
A page that mixes addition and subtraction also asks you to notice which operation each problem needs. Mix two or three supported skills after each one is familiar.
Use mistakes to choose what comes next
Check whether the wrong operation was chosen or the calculation went wrong. Return to a single skill when the procedure breaks down; use a smaller mixed set when choosing the operation is the problem.