1st Grade Missing Addends Worksheet
Find the missing addend that makes each addition sentence true.
- Homework
- Morning Work
- Centers
- Intervention
Download the Free Printable PDF
No sign-up required. Clean, low-ink US Letter format.
- Grade
- 1st Grade
- Subject
- Math
- Skill
- Addition
- Topic
- finding the missing addend
- Difficulty
- Standard
- Time
- 10 minutes
- Pages
- 2 (incl. answer key)
- Format
- Printable PDF (US Letter)
- Answer key
- Included
- Best for
- homework, morning work, centers, intervention
Worksheet details
What This Worksheet Practices
Students will find the missing addend in an addition sentence within 20 using counting on or subtraction.
- Finding a missing part of a sum
- Counting on to the total
- Connecting addition and subtraction
Worksheet Preview
Finding the missing part
A missing-addend problem like 6 + ? = 10 flips addition around: students know the whole and one part, and have to find the other part. They can count up from the first number to the total, or think of it as subtraction (10 - 6). Either way, it builds the part-part-whole thinking behind fact families.
How to use it
Have students count up from the given number to the total, or subtract. Watch for kids who add the two visible numbers out of habit. This leads naturally into fact families.
👩🏫 Teacher note
A missing addend is a count-on or a subtraction in disguise: 6 + ? = 10 asks 'how many more from 6 to 10?' This builds the part-part-whole idea.
🏠 Parent note
Count up from the first number to the total. 6 + ? = 10: count 7, 8, 9, 10 - that's 4 more.
Common Mistakes to Watch For
- Adding the two given numbers instead of finding the missing part
- Counting on incorrectly
Answer Key
Each answer shows the missing number.
⬇ Download Answer Key (PDF)Related Worksheets
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Addition Facts to 10 Worksheet
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Addition Within 20 Worksheet
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