2-Digit Subtraction with Borrowing (276)

Lesson Plan

Regrouping in Subtraction

Standards

Printable Aids

Teaching Notes

This collection focuses on developing a deep understanding of regrouping (borrowing) in 2-digit subtraction. Emphasize place value and the concept of exchanging one ten for ten ones. Visual aids like base-ten blocks can be highly effective.

Vocabulary

Regroup: Borrowing from a higher place value.

Place Value: Value of a digit based on its position.

Common Mistakes

• Subtracting smaller top digit from larger bottom digit (e.g., 2-9 becomes 7).
• Forgetting to ungroup/borrow when needed.
• Not lining up ones and tens correctly.
• Forgetting to borrow from the tens place when the ones digit of the minuend is smaller than the ones digit of the subtrahend.
• Subtracting the smaller digit from the larger digit in the ones place without regrouping.
• Incorrectly adjusting the tens digit after borrowing.

Differentiation

Discussion Questions

• Why do we sometimes need to 'borrow' when we subtract?
• What does it mean to 'regroup' a ten into ones?
• Can you explain the steps to subtract 43 - 17 to a friend?

Extension Activities

• Practice subtraction with larger numbers.
• Create subtraction word problems.
• Use a number line for subtraction.

Parent Tip

Use coins or blocks to show regrouping for subtraction.

Skill Cluster

Number and Operations in Base Ten

Grade Level

2-4

Skills Practiced

Prerequisites

• Column Subtraction
• Place Value
• Subtracting 2-Digit Numbers Without Regrouping
• Place Value to 100

Next Steps

• Multi-Step Problems
• Checking Subtraction with Addition
• Subtracting 3-Digit Numbers with Regrouping
• Mental Math: Subtracting 2-Digit Numbers
• Subtract 3-Digit Numbers with Borrowing
• 2-Digit Subtraction Word Problems