Teaching 2-digit addition with missing addends? Do your students need focused practice with unknown addend (missing number) problems? Looking for motivating independent work, early finisher activities, or math center worksheets?

This print-and-go resource provides 10 fun and skill-building worksheets that help students find missing addends, strengthen number sense, and deepen understanding of the relationship between addition and subtraction. Puzzles and color-by-number activities keep students interested while they practice.

What’s Included (10 worksheets)

5 Puzzle Worksheets

• 16 problems per page
  • 12 number equations with a missing addend
  • 1 pyramid puzzle with 4 missing addends
• Answer keys included

5 Color by Number Worksheets

• 8 number equations with a missing addend per page
• Color-by-number robot picture
• Missing addends are used as the numbers to color
• Answer keys included

Skills Covered

• Finding the missing addend (unknown addend)
• 2-digit addition within 100
• Addition strategies and mental math
• Part-part-whole relationships
• Understanding the connection between addition and subtraction

Works Great For

• Independent practice
• Math centers
• Early finishers
• Morning work / bell ringers
• Small groups
• Partner work
• Formative assessment
• Homework

Teacher tip: These look great on a bulletin board or in a parent-teacher conference folder!

Give your students motivating practice with missing addends and 2-digit addition using these puzzle and color-by-number worksheets!

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