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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 125 · 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. 1.30 + 59 =
  2. 2.88 + 69 =
  3. 3.69 + 63 =
  4. 4.61 + 73 =
  5. 5.35 + 79 =
  6. 6.35 + 37 =
  7. 7.22 + 51 =
  8. 8.76 + 31 =
  9. 9.79 + 41 =
  10. 10.47 + 58 =
  11. 11.46 + 71 =
  12. 12.86 + 69 =
  13. 13.22 + 31 =
  14. 14.83 + 81 =
  15. 15.31 + 49 =
  16. 16.68 + 83 =
  17. 17.77 + 88 =
  18. 18.78 + 87 =
  19. 19.89 + 57 =
  20. 20.24 + 31 =
  21. 21.56 + 59 =
  22. 22.65 + 64 =
  23. 23.34 + 88 =
  24. 24.87 + 61 =
  25. 25.47 + 73 =
  26. 26.55 + 19 =
  27. 27.82 + 76 =
  28. 28.56 + 52 =
  29. 29.21 + 16 =
  30. 30.28 + 38 =
  31. 31.85 + 77 =
  32. 32.43 + 33 =
  33. 33.35 + 48 =
  34. 34.69 + 86 =
  35. 35.51 + 33 =
  36. 36.78 + 89 =
  37. 37.83 + 72 =
  38. 38.29 + 43 =
  39. 39.51 + 72 =
  40. 40.72 + 64 =

Answer key

  1. 89
  2. 157
  3. 132
  4. 134
  5. 114
  6. 72
  7. 73
  8. 107
  9. 120
  10. 105
  11. 117
  12. 155
  13. 53
  14. 164
  15. 80
  16. 151
  17. 165
  18. 165
  19. 146
  20. 55
  21. 115
  22. 129
  23. 122
  24. 148
  25. 120
  26. 74
  27. 158
  28. 108
  29. 37
  30. 66
  31. 162
  32. 76
  33. 83
  34. 155
  35. 84
  36. 167
  37. 155
  38. 72
  39. 123
  40. 136

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