Grade 2/Subtraction
Subtract Teen Numbers (244)
Subtract minuands from 10–19 to build place-value subtraction skills and fluency.
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Teacher Resources
Lesson Plan
Basic Subtraction Strategies
Standards
1.OA.C.6Printable Aids
Number Line 0-20Subtraction Flashcards
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
SupportProvide manipulatives (e.g., ten frames, unifix cubes) or a number line. Encourage drawing pictures to visualize breaking apart numbers. Review number bonds to 10.
ChallengeChallenge students to solve problems mentally without visual aids. Ask them to create their own subtraction word problems for teen numbers or explain their chosen strategies in detail.
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.
Learning Path
Skill Cluster
Number Sense & Operations
Grade Level
1-2
Skills Practiced
subtracting within 20finding the differencecounting back
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)
