Grade 3/Addition
Missing Addend (General 2-Digit) (759)
General missing addend with 2-digit numbers; totals may exceed 100.
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Teacher Resources
Teaching Notes
Encourage mental subtraction and check by addition.
Common Mistakes
- Incorrect operation chosen
- Errors in regrouping
- Misaligning place values
- Basic subtraction fact errors
Differentiation
SupportUse manipulatives or number lines for visualization.
ChallengeCreate multi-step missing addend problems.
Discussion Questions
- How does subtraction help find a missing addend?
- What strategies work best for 2-digit missing addends?
- When might you use this skill in daily life?
- How can you check if your answer is correct?
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
12 minutes
Skills Practiced
missing addend general
Prerequisites
- missing_addend_tens
- Addition within 100
- Subtraction within 100
- Fact Families
Next Steps
- Multi-digit Missing Addends
- Missing Addend Word Problems
- Missing Addend (3-Digit Sums) - Set A
- Missing Subtrahend (2-Digit) - Set A
- Addition & Subtraction Word Problems (Multi-Digit)