Shark Learning
Grade 2/Subtraction

Subtract 1-Digit from 3-Digit Numbers with Regrouping (248)

Practice subtracting a single digit from three-digit numbers to develop multi-digit subtraction confidence.
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Teacher Resources
Lesson Plan

Subtracting Single Digits

Standards
2.NBT.B.5
Printable Aids
Hundreds ChartBase Ten Blocks Guide
Teaching Notes

Introduce subtraction of 1-digit from 3-digit numbers, emphasizing the concept of regrouping (borrowing). Use place value charts or base-ten blocks to model the decomposition of tens or hundreds when necessary, connecting concrete representations to the standard algorithm.

Vocabulary
Hundreds: The place value for 100s.
Regrouping: Exchanging place values to subtract.
Common Mistakes
  • Forgetting to regroup or 'borrow' when the ones digit in the minuend is smaller than the subtrahend.
  • Incorrectly regrouping, such as borrowing from the hundreds place when only the tens place is needed for regrouping.
  • Misaligning digits when setting up the problem, leading to incorrect calculations.
Differentiation
SupportProvide manipulatives like base-ten blocks or drawn models on a place value chart. Use simpler numbers or guide students step-by-step through the regrouping process.
ChallengeIntroduce problems with multiple regroupings (e.g., 3-digit from 3-digit numbers). Challenge students to explain their reasoning or create their own problems.
Discussion Questions
  • Why do we sometimes need to 'borrow' or regroup when subtracting?
  • How does understanding place value help us with regrouping?
  • Can you explain the steps to regroup when subtracting from the tens place? From the hundreds place?
Extension Activities
  • Use base-ten blocks.
  • Draw the regrouping steps.
  • Work backwards.
Parent Tip

Use place value disks or drawings to show borrowing across zeros.

Learning Path
Skill Cluster

Multi-Digit Subtraction

Grade Level

2-3

Skills Practiced
3 digit minus 1 digitregrouping across zerosmulti step subtraction
Prerequisites
  • Basic Subtraction Facts
  • Place Value
  • Subtraction facts within 20
  • Place value to 1000
  • Subtracting 1-digit from 2-digit numbers (with regrouping)
Next Steps
  • Two-Digit Subtraction
  • Regrouping Strategies
  • Subtracting 2-digit from 3-digit numbers (with regrouping)
  • Subtracting 3-digit from 3-digit numbers (with regrouping)
  • Subtraction within 1000
  • Subtract 2-Digit from 3-Digit Numbers with Regrouping
  • Subtract 3-Digit from 3-Digit Numbers with Regrouping
  • Subtraction within 1000 (Regrouping)