Adding whole tens (3 addends)
Browse 0 free printable Adding whole tens (3 addends) worksheets for Third 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 Third curriculum, or a tutor helping a student catch up, these free printable worksheets are ready to use today.
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Practice Questions
- 30 + 80 + 10 = ?
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120
- 40 + 20 + 30 = ?
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90
- 50 + 30 + 20 = ?
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100
- 70 + 10 + 20 = ?
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100
- 20 + 40 + 50 = ?
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110
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Teacher Resources
Teaching Notes
Teach students to add in pairs: combine first two tens, then add the third. Emphasize counting by tens (30, 50, 90). Model thinking aloud: "I have 3 tens and 2 tens, that's 5 tens or 50. Then add 4 more tens to get 9 tens or 90."
Vocabulary
Common Mistakes
- Adding ones place instead of tens
- Forgetting to add all three numbers
- Losing track of which numbers were already added
- Writing 3+2+4=9 instead of 90
- Forgetting to include the zero in the sum (e.g., 20+30+40=9 instead of 90).
- Miscounting when summing the 'tens' digits if done mentally.
- Difficulty tracking multiple addends without visual aids.
Differentiation
Discussion Questions
- How is adding 20 + 30 + 40 similar to adding 2 + 3 + 4?
- Why is it important to know how to add whole tens quickly?
- Can you think of a real-life situation where you might add three groups of tens?
Extension Activities
- Use a calculator to check sums.
- Create word problems with three addends.
- Practice adding in reverse order.
Parent Tip
Have your child add three small groups of objects together.
Learning Path
Skill Cluster
Number Sense & Operations: Addition
Estimated Time
15 minutes