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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 20 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.81 + 12 =
  2. 2.54 + 32 =
  3. 3.44 + 64 =
  4. 4.60 + 35 =
  5. 5.71 + 55 =
  6. 6.75 + 44 =
  7. 7.34 + 43 =
  8. 8.32 + 44 =
  9. 9.35 + 72 =
  10. 10.55 + 65 =
  11. 11.33 + 58 =
  12. 12.55 + 34 =
  13. 13.27 + 75 =
  14. 14.84 + 24 =
  15. 15.72 + 51 =
  16. 16.68 + 42 =
  17. 17.55 + 81 =
  18. 18.39 + 52 =
  19. 19.51 + 44 =
  20. 20.49 + 21 =
  21. 21.78 + 36 =
  22. 22.36 + 55 =
  23. 23.77 + 77 =
  24. 24.37 + 32 =
  25. 25.33 + 29 =
  26. 26.78 + 26 =
  27. 27.24 + 29 =
  28. 28.21 + 42 =
  29. 29.35 + 85 =
  30. 30.54 + 33 =
  31. 31.74 + 74 =
  32. 32.24 + 67 =
  33. 33.51 + 51 =
  34. 34.52 + 84 =
  35. 35.83 + 48 =
  36. 36.60 + 56 =
  37. 37.33 + 17 =
  38. 38.27 + 34 =
  39. 39.87 + 87 =
  40. 40.83 + 81 =

Answer key

  1. 93
  2. 86
  3. 108
  4. 95
  5. 126
  6. 119
  7. 77
  8. 76
  9. 107
  10. 120
  11. 91
  12. 89
  13. 102
  14. 108
  15. 123
  16. 110
  17. 136
  18. 91
  19. 95
  20. 70
  21. 114
  22. 91
  23. 154
  24. 69
  25. 62
  26. 104
  27. 53
  28. 63
  29. 120
  30. 87
  31. 148
  32. 91
  33. 102
  34. 136
  35. 131
  36. 116
  37. 50
  38. 61
  39. 174
  40. 164

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