Grade 2/Addition
➕ Friendly Decomposition Addition
Break addends into friendly tens and hundreds, then add mentally.
Browse 6 ➕ Friendly Decomposition Addition worksheets for Grade 2 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 2 curriculum, or a tutor helping a student catch up, choose an available worksheet that matches what your student is practising.
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Prerequisites
What to Do Next
Practice Questions
- 7 + 3 + 8 + 2 = ?
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20
- 6 + 4 + 9 + 1 = ?
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20
- 25 + 75 + 18 + 32 = ?
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150
- 40 + 60 + 22 + 28 = ?
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150
- 45 + 55 + 65 + 35 = ?
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200
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Teacher Resources
Teaching Notes
Model pairing then partial sums.
Common Mistakes
- Wrong pair total
- Incorrect decomposition.
- Forgetting remaining value.
- Misidentifying benchmark target.
- Adding partial sums incorrectly.
Differentiation
SupportUse manipulatives or number lines for decomposition.
ChallengeExtend to larger numbers or include multiple addends.
Discussion Questions
- Why is making a ten or hundred helpful?
- How does this strategy support mental math?
- When is this decomposition strategy most useful?
- Can you explain another addition strategy?
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
12 minutes
Skills Practiced
Benchmark groupingMental chunking