Subtract Teen Numbers

Lesson Plan

Basic Subtraction Strategies

Standards

Printable Aids

Teaching Notes

This collection focuses on subtracting from teen numbers (10-19) to build a strong foundation for two-digit subtraction. Encourage students to use strategies like 'making a ten' or 'counting back' to develop mental math fluency and place value understanding.

Vocabulary

Subtract: To take away or find the difference.

Difference: The result of subtraction.

Common Mistakes

• Incorrectly borrowing or regrouping when subtracting from teen numbers (e.g., 15 - 7, treating the 1 as a 0).
• Confusing subtraction with addition facts.
• Losing track when counting back on a number line or using fingers.

Differentiation

Discussion Questions

• How does knowing your addition facts help you subtract?
• What strategies can you use to subtract from a teen number?
• When might you use subtraction from teen numbers in real life?

Extension Activities

• Use a number line.
• Draw a picture.
• Use flashcards.

Parent Tip

Use objects like blocks or coins to act out subtraction problems.

Skill Cluster

Number Sense & Operations

Grade Level

1-2

Skills Practiced

Prerequisites

• Counting Backwards
• Number Bonds
• Subtract within 10
• Number Bonds to 10
• Understanding Teen Numbers

Next Steps

• Subtraction with Regrouping
• Word Problems
• Subtract within 20 (mixed problems)
• Subtract 2-digit numbers (no regrouping)
• Introduction to Regrouping
• Subtract within 20
• Subtract 2-Digit Numbers (No Regrouping)
• Fact Families (Addition & Subtraction)