Three-Addend Mental Sums (1- & 2-Digit)
Browse 6 free printable Three-Addend Mental Sums (1- & 2-Digit) worksheets for Grade 2 Math. These Addition worksheets are designed to give students targeted practice and build confidence in math.
Worksheets are available at multiple difficulty levels — Easy, Medium, and Hard — so you can meet every student where they are. Each worksheet is an instant PDF download: print as many copies as you need for your classroom, tutoring sessions, or home practice at no cost.
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, these free printable worksheets are ready to use today.
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Prerequisites
What to Do Next
Practice Questions
- 5 + 40 + 55 = ?
Show answer
100
- 7 + 28 + 32 = ?
Show answer
67
- 6 + 24 + 35 = ?
Show answer
65
- 9 + 41 + 29 = ?
Show answer
79
- 8 + 33 + 27 = ?
Show answer
68
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Teacher Resources
Teaching Notes
Have students circle pairs that make ten or hundred.
Common Mistakes
- Forgetting make-ten pairs.
- Miscarrying tens mentally.
- Ignoring mental strategies.
- Adding left-to-right.
Differentiation
Discussion Questions
- How do make-ten pairs help simplify addition?
- What other friendly sums did you find?
- Can you explain your mental strategy?
- When is this strategy most useful?
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
12 minutes