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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 801 · 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. 1.45 + 14 =
  2. 2.49 + 31 =
  3. 3.35 + 66 =
  4. 4.38 + 41 =
  5. 5.78 + 37 =
  6. 6.39 + 23 =
  7. 7.83 + 55 =
  8. 8.78 + 25 =
  9. 9.83 + 39 =
  10. 10.22 + 31 =
  11. 11.50 + 29 =
  12. 12.73 + 45 =
  13. 13.48 + 49 =
  14. 14.68 + 69 =
  15. 15.35 + 78 =
  16. 16.57 + 87 =
  17. 17.76 + 24 =
  18. 18.38 + 33 =
  19. 19.72 + 81 =
  20. 20.79 + 68 =
  21. 21.45 + 29 =
  22. 22.89 + 49 =
  23. 23.53 + 23 =
  24. 24.50 + 73 =
  25. 25.69 + 15 =
  26. 26.33 + 34 =
  27. 27.25 + 81 =
  28. 28.48 + 67 =
  29. 29.68 + 29 =
  30. 30.88 + 33 =
  31. 31.72 + 73 =
  32. 32.50 + 71 =
  33. 33.26 + 77 =
  34. 34.76 + 69 =
  35. 35.82 + 81 =
  36. 36.45 + 27 =
  37. 37.69 + 61 =
  38. 38.69 + 45 =
  39. 39.42 + 79 =
  40. 40.82 + 78 =

Answer key

  1. 59
  2. 80
  3. 101
  4. 79
  5. 115
  6. 62
  7. 138
  8. 103
  9. 122
  10. 53
  11. 79
  12. 118
  13. 97
  14. 137
  15. 113
  16. 144
  17. 100
  18. 71
  19. 153
  20. 147
  21. 74
  22. 138
  23. 76
  24. 123
  25. 84
  26. 67
  27. 106
  28. 115
  29. 97
  30. 121
  31. 145
  32. 121
  33. 103
  34. 145
  35. 163
  36. 72
  37. 130
  38. 114
  39. 121
  40. 160

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