Grade 1/Addition
Add Whole Tens
Fluency adding whole tens to 2-digit numbers.
Browse 6 Add Whole Tens worksheets for Grade 1 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 1 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
- 34 + 50 = ?
Show answer
84
- 27 + 40 = ?
Show answer
67
- 65 + 30 = ?
Show answer
95
- 48 + 20 = ?
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68
- 53 + 40 = ?
Show answer
93
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Teacher Resources
Teaching Notes
Emphasize adding tens affects only the tens place.
Common Mistakes
- Adding to the ones digit
- Incorrectly identifying tens place
- Forgetting to update the tens value
Differentiation
SupportUse base-10 blocks or a number line to visualize.
ChallengeAdd whole hundreds; create two-step mental problems.
Discussion Questions
- How does adding 10, 20, or 30 change a number?
- What part of the number stays the same?
- When is it useful to add whole tens mentally?
- Can this strategy be used with other numbers?
Learning Path
Skill Cluster
Number Sense & Mental Math
Estimated Time
8 minutes
Skills Practiced
Add whole tens