Grade 3/Addition
2-Digit (No Carry) (750)
Mental addition of two 2-digit numbers constructed to avoid regrouping.
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Teaching Notes
Encourage tens-first, ones-next mental strategies.
Common Mistakes
- Mixing up tens and ones
- Accidentally regrouping
- Miscalculating basic facts
- Rushing mental steps
Differentiation
SupportUse a place value chart or base ten blocks.
ChallengeSolve mentally with larger numbers or three addends.
Discussion Questions
- How did you add the tens mentally?
- What strategy worked best for you?
- When is mental addition helpful?
- Can you explain your thought process?
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
10 minutes
Skills Practiced
addition mental no carry
Prerequisites
- 734
- Adding within 20
- Place Value (Tens & Ones)
- Basic Addition Facts
Next Steps
- 2-Digit Addition (with regrouping)
- Mental Addition (multiples of 10)
- 2-Digit (With Carry) - Set A
- Mental Math Strategies - Place Value