Error Repair

About This Worksheet

This worksheet helps sixth-grade students find and correct mistakes in decimal calculations. Each problem already includes an incorrect answer, so students must inspect the work, identify the error, and then solve the problem correctly. The page includes addition, subtraction, multiplication, and division, which gives students practice checking several different decimal procedures. It is especially useful for building careful thinking instead of having students rush straight to an answer.

What Students Practice

Students analyze incorrect decimal equations and decide what went wrong in each one. They must pay attention to place value, decimal alignment, multiplication placement, and division setup depending on the problem. After spotting the mistake, they solve the expression again and record the correct answer. This gives students practice explaining errors as well as fixing them.

Why This Matters

Students often make the same decimal mistakes repeatedly without noticing the pattern. Error analysis helps them slow down and understand why an answer does not make sense. It also strengthens self-checking because students learn what common decimal mistakes look like. That can make them more independent when solving future problems.

Teaching Tips

Ask students to describe the mistake before they calculate the correct answer. Encourage them to estimate the result so they can judge whether the given answer is reasonable. If a student struggles, have them rewrite the problem vertically and check the place values one column at a time. You can also use the worksheet for partner discussion by having students explain one corrected problem to each other.

Curriculum Standards

This worksheet supports CCSS.MATH.CONTENT.6.NS.B.3, which asks sixth-grade students to fluently compute with multi-digit decimals using the standard algorithm. It also strengthens mathematical reasoning because students must analyze and explain incorrect work. The activity fits well as review, intervention, small-group instruction, or a formative assessment.