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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 499 · 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. 1.22 + 36 =
  2. 2.54 + 47 =
  3. 3.55 + 47 =
  4. 4.76 + 71 =
  5. 5.71 + 27 =
  6. 6.31 + 47 =
  7. 7.78 + 69 =
  8. 8.38 + 19 =
  9. 9.82 + 69 =
  10. 10.52 + 19 =
  11. 11.46 + 48 =
  12. 12.30 + 19 =
  13. 13.40 + 71 =
  14. 14.21 + 72 =
  15. 15.22 + 61 =
  16. 16.85 + 65 =
  17. 17.36 + 38 =
  18. 18.68 + 17 =
  19. 19.77 + 64 =
  20. 20.59 + 49 =
  21. 21.56 + 31 =
  22. 22.73 + 16 =
  23. 23.28 + 21 =
  24. 24.89 + 24 =
  25. 25.61 + 31 =
  26. 26.86 + 83 =
  27. 27.87 + 46 =
  28. 28.77 + 76 =
  29. 29.72 + 42 =
  30. 30.49 + 71 =
  31. 31.43 + 25 =
  32. 32.68 + 45 =
  33. 33.44 + 65 =
  34. 34.45 + 47 =
  35. 35.58 + 31 =
  36. 36.49 + 69 =
  37. 37.41 + 87 =
  38. 38.31 + 71 =
  39. 39.42 + 32 =
  40. 40.28 + 71 =

Answer key

  1. 58
  2. 101
  3. 102
  4. 147
  5. 98
  6. 78
  7. 147
  8. 57
  9. 151
  10. 71
  11. 94
  12. 49
  13. 111
  14. 93
  15. 83
  16. 150
  17. 74
  18. 85
  19. 141
  20. 108
  21. 87
  22. 89
  23. 49
  24. 113
  25. 92
  26. 169
  27. 133
  28. 153
  29. 114
  30. 120
  31. 68
  32. 113
  33. 109
  34. 92
  35. 89
  36. 118
  37. 128
  38. 102
  39. 74
  40. 99

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