Grade 3/Addition
Mental 2-Digit Addition
General two-digit mental addition including regrouping where natural.
Browse 6 Mental 2-Digit Addition worksheets for Grade 3 Math. These Addition worksheets are designed to give students targeted practice and build confidence in math.
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Whether you're a teacher looking for addition practice problems, a homeschool parent building a Grade 3 curriculum, or a tutor helping a student catch up, choose an available worksheet that matches what your student is practising.
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What to Do Next
Practice Questions
- 46 + 89 = ?
Show answer
135
- 57 + 68 = ?
Show answer
125
- 38 + 47 = ?
Show answer
85
- 64 + 29 = ?
Show answer
93
- 58 + 37 = ?
Show answer
95
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Teacher Resources
Teaching Notes
Model round-and-adjust and split-add methods.
Common Mistakes
- Incorrect regrouping mentally
- Forgetting to add the 'adjusted' part
- Misaligning place values
- Over-reliance on standard algorithm
Differentiation
SupportUse base ten blocks or number lines. Start with no regrouping.
ChallengeApply to larger numbers. Estimate before solving mentally.
Discussion Questions
- How does 'building a ten' help with mental addition?
- Can you explain your strategy to a partner?
- When is it easier to build a hundred first?
- What if there's no regrouping needed?
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
12 minutes
Skills Practiced
Addition mental regroup