Add two 1-digit numbers, missing addend
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Free printable add two 1-digit numbers with missing addend worksheets for 2nd grade. Students complete equations like 6 + ___ = 13 by identifying the unknown addend within 20, strengthening the connection between addition and subtraction. These problems develop early algebraic reasoning alongside basic fact fluency. Part of our addition worksheets collection.
What You'll Learn
- Find the missing single-digit addend in basic equations
- Use known facts to solve for an unknown number
- Strengthen understanding of addition and subtraction relationships
FAQ
What mental strategies work best for single-digit missing addend problems?⌄
Counting up from the known addend to the sum and using known subtraction facts (e.g., knowing 13 - 6 = 7 to find 6 + ___ = 13) are both efficient strategies at this level.
How do these worksheets connect to fact families?⌄
Each missing addend equation belongs to a fact family, so working through these problems reinforces that addition and subtraction are inverse operations sharing the same three numbers.
Are missing addend problems within 20 appropriate for all 2nd graders?⌄
Most 2nd graders are ready for this work, especially after mastering basic addition facts; the problems serve as both a fluency check and an introduction to equation-solving thinking.
Ratings & Reviews
3David L.
2nd Grade Teacher · Verified download
Looking forward to this! All the other ClassWeekly worksheets are excellent so I know this will be too.
Helpful · 8
Jamie T.
1st Grade Teacher · Verified download
Thanks for creating this! I'll be using it the moment it's available.
Helpful · 4
Emily W.
Homeschool parent · Verified download
Excited for this one! I've been hunting for a good printable on this topic for weeks.
Helpful · 9
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