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Grade 2/Addition

Adding within 0-10 - missing addend

Grade 2 practice on missing addends within 10. Build fluency finding the number that completes each sum.
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Easy(Sums 1–5, find missing addend)
1
20 questions
2
20 questions
3
20 questions
4
20 questions
5
Pro
20 questions
Medium(Sums 1–9, find missing addend)
1
20 questions
2
20 questions
3
20 questions
4
20 questions
5
Pro
20 questions
Hard(Sums 6–9, find missing addend)
1
20 questions
2
20 questions
3
20 questions
4
20 questions
5
Pro
20 questions
Prerequisites
Adding within 0-1018 WS
4 + 3 =
What to Do Next
Add a 2-digit and 1-digit number, no regrouping15 WS
24 + 6 =

Practice Questions

  1. ? + 3 = 9
    Show answer

    6

  2. 4 + ? = 10
    Show answer

    6

  3. ? + 2 = 7
    Show answer

    5

  4. 5 + ? = 8
    Show answer

    3

  5. ? + 1 = 6
    Show answer

    5

Teacher Resources
Teaching Notes

Guide students to use various strategies like counting on, using number bonds, or applying inverse operations (subtraction) to find the missing addend efficiently. Emphasize number fact fluency within 10.

Vocabulary
Missing addend: The unknown number in an addition problem.
Equation: A number sentence with an equals sign.
Common Mistakes
  • Adding the two known numbers instead of finding the difference.
  • Miscounting when counting on or back.
  • Difficulty with number fact recall within 10.
Differentiation
SupportProvide manipulatives (e.g., counters, number cubes) or a number line to visualize the problem. Start with problems where the missing addend is small.
ChallengeChallenge with larger sums (up to 20), multi-step problems, or have students create their own missing addend equations.
Discussion Questions
  • What strategy did you use to find the missing number?
  • How does knowing your addition facts help you solve these problems?
  • Can you explain how this is like solving a puzzle?
  • If you know 3 + 7 = 10, how can that help you solve 3 + ? = 10?
Extension Activities
  • Use a number line.
  • Draw to find the missing part.
  • Guess and check.
Parent Tip

Ask 'What plus this equals that?' using objects.

Learning Path
Skill Cluster

Number Sense & Operations

Estimated Time

15 minutes

Skills Practiced
Missing addendsCounting onNumber bonds