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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 139 · 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. 1.43 + 62 =
  2. 2.32 + 12 =
  3. 3.89 + 78 =
  4. 4.82 + 65 =
  5. 5.66 + 18 =
  6. 6.89 + 56 =
  7. 7.74 + 66 =
  8. 8.76 + 29 =
  9. 9.89 + 19 =
  10. 10.37 + 67 =
  11. 11.48 + 71 =
  12. 12.88 + 33 =
  13. 13.55 + 66 =
  14. 14.24 + 32 =
  15. 15.42 + 51 =
  16. 16.23 + 62 =
  17. 17.24 + 88 =
  18. 18.39 + 76 =
  19. 19.86 + 15 =
  20. 20.71 + 86 =
  21. 21.25 + 21 =
  22. 22.42 + 89 =
  23. 23.71 + 15 =
  24. 24.78 + 59 =
  25. 25.87 + 81 =
  26. 26.62 + 72 =
  27. 27.54 + 18 =
  28. 28.31 + 63 =
  29. 29.75 + 81 =
  30. 30.49 + 41 =
  31. 31.46 + 24 =
  32. 32.77 + 38 =
  33. 33.23 + 61 =
  34. 34.77 + 19 =
  35. 35.79 + 51 =
  36. 36.81 + 21 =
  37. 37.63 + 68 =
  38. 38.67 + 49 =
  39. 39.37 + 48 =
  40. 40.43 + 71 =

Answer key

  1. 105
  2. 44
  3. 167
  4. 147
  5. 84
  6. 145
  7. 140
  8. 105
  9. 108
  10. 104
  11. 119
  12. 121
  13. 121
  14. 56
  15. 93
  16. 85
  17. 112
  18. 115
  19. 101
  20. 157
  21. 46
  22. 131
  23. 86
  24. 137
  25. 168
  26. 134
  27. 72
  28. 94
  29. 156
  30. 90
  31. 70
  32. 115
  33. 84
  34. 96
  35. 130
  36. 102
  37. 131
  38. 116
  39. 85
  40. 114

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