Two-Digit Addition

Grade 1 Math Worksheet - Building Confidence

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Write the sum on the line.

  1. 20 + 50 =

  2. 30 + 9 =

  3. 30 + 10 =

  4. 5 + 70 =

  5. 40 + 2 =

  6. 10 + 60 =

  7. 50 + 10 =

  8. 6 + 80 =

  9. 30 + 8 =

  10. 20 + 80 =

  11. 30 + 60 =

  12. 1 + 60 =

  13. 60 + 4 =

  14. 20 + 40 =

  15. 8 + 90 =

  16. 60 + 20 =

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Two-Digit Addition

Answer Key - Grade 1 Math Worksheet - Building Confidence

Write the sum on the line.

  1. 20 + 50 = 70

  2. 30 + 9 = 39

  3. 30 + 10 = 40

  4. 5 + 70 = 75

  5. 40 + 2 = 42

  6. 10 + 60 = 70

  7. 50 + 10 = 60

  8. 6 + 80 = 86

  9. 30 + 8 = 38

  10. 20 + 80 = 100

  11. 30 + 60 = 90

  12. 1 + 60 = 61

  13. 60 + 4 = 64

  14. 20 + 40 = 60

  15. 8 + 90 = 98

  16. 60 + 20 = 80