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Fourth/Subtraction

3-Digit Subtraction without Regrouping

Practice subtracting 3-digit numbers from 3-digit numbers without borrowing.
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WorksheetsTeacher InfoLearning Path

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Prerequisites
Two-Digit Subtraction: Missing Minuend or Subtrahend11 WS
45
- ?
20
What to Do Next
3-Digit Column Subtraction: Find the Missing Number11 WS
543
- ?
210

Practice Questions

  1. 865 − 432 = ?
    Show answer

    433

  2. 754 − 0 = ?
    Show answer

    433

  3. 0 − 210 = ?
    Show answer

    433

  4. 532 − 0 = ?
    Show answer

    431

  5. 0 − 110 = ?
    Show answer

    311

Teacher Resources
Lesson Plan

Vertical Subtraction Methods

Standards
2.NBT.B.7
Printable Aids
Place Value ChipsGrid Paper
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
SupportUse base-ten blocks or place value charts to visually represent the numbers and the subtraction process. Provide graph paper to help students align digits correctly.
ChallengeChallenge students with mental math problems for 3-digit subtraction without regrouping. Introduce estimation of differences before calculating exact answers.
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.

Learning Path
Skill Cluster

Number Sense & Operations

Grade Level

2-4

Skills Practiced
Subtracting three digit numbersPlace value hundredsColumn subtraction