3-Digit Subtraction without Regrouping (274)

Lesson Plan

Vertical Subtraction Methods

Standards

Printable Aids

Teaching Notes

Emphasize subtracting digits in the ones, tens, and hundreds columns separately. Reinforce the importance of place value and aligning numbers correctly. This collection builds foundational skills before introducing regrouping.

Vocabulary

Three-digit number: A number with hundreds, tens, and ones places.

Hundreds place: The leftmost digit in a three-digit number.

Common Mistakes

• Subtracting top from bottom regardless of value.
• Forgetting to reduce the neighbor after borrowing.
• Misalignment of hundreds, tens, and ones.
• Not aligning numbers by place value (ones, tens, hundreds).
• Subtracting the smaller digit from the larger digit within a column when the top number is smaller (e.g., 2-5 instead of 5-2).
• Incorrectly performing basic subtraction facts.

Differentiation

Discussion Questions

• How is subtracting 3-digit numbers similar to subtracting 2-digit numbers?
• Why is it important to start subtracting from the ones place?
• What does 'no borrowing' mean when we are subtracting numbers?

Extension Activities

• Create your own 3-digit subtraction problems.
• Subtract larger three-digit numbers.

Parent Tip

Use graph paper to help align the digits correctly.

Skill Cluster

Number Sense & Operations

Grade Level

2-4

Skills Practiced

Prerequisites

• Place Value
• Basic Subtraction
• Subtracting 2-Digit Numbers (No Regrouping)
• Place Value to 999
• Basic Subtraction Facts within 20

Next Steps

• Subtraction with Borrowing
• Multi-Digit Subtraction
• Subtracting 3-Digit Numbers with Regrouping
• Estimating Differences for 3-Digit Numbers
• Adding 3-Digit Numbers (No Regrouping)
• Subtracting Multiples of 10 and 100