Missing Number Worksheets
Free printable missing number worksheets with step-by-step answer keys. Every worksheet is uniquely generated so students never see the same problems twice. Topics covered range from missing addend, addition only at the easy level through to multi-step or paired unknowns at the advanced level.
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Difficulty Levels
Beginner
- Concepts
- Missing addend, addition only
- Number Range
- addends 1–12, sums to 22
- Steps
- 1 step
- Example
- __ + 5 = 12
Easy
- Concepts
- Missing number with subtraction
- Number Range
- 1–25, add/subtract
- Steps
- 1 step
- Example
- __ − 5 = 7
Medium
- Concepts
- Missing factor or divisor
- Number Range
- factors 2–9, products to 81
- Steps
- 1 step
- Example
- __ × 4 = 20
Hard
- Concepts
- Multi-step or paired unknowns
- Number Range
- 1–20, mixed operations, money
- Steps
- 2–3 steps
- Example
- __ × 3 + 2 = 17
Grade Availability
Missing Number worksheets are available for Grades 1–3. Problems are automatically adjusted to match grade-level expectations in number range, complexity, and notation.
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