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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 520 · 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. 1.83 + 62 =
  2. 2.60 + 38 =
  3. 3.31 + 66 =
  4. 4.46 + 75 =
  5. 5.62 + 89 =
  6. 6.66 + 35 =
  7. 7.73 + 71 =
  8. 8.29 + 54 =
  9. 9.89 + 73 =
  10. 10.75 + 32 =
  11. 11.68 + 77 =
  12. 12.50 + 14 =
  13. 13.57 + 51 =
  14. 14.35 + 84 =
  15. 15.51 + 47 =
  16. 16.21 + 46 =
  17. 17.86 + 47 =
  18. 18.63 + 29 =
  19. 19.51 + 51 =
  20. 20.41 + 24 =
  21. 21.83 + 24 =
  22. 22.40 + 36 =
  23. 23.40 + 63 =
  24. 24.75 + 25 =
  25. 25.57 + 41 =
  26. 26.40 + 53 =
  27. 27.81 + 28 =
  28. 28.43 + 12 =
  29. 29.37 + 83 =
  30. 30.31 + 84 =
  31. 31.36 + 34 =
  32. 32.26 + 82 =
  33. 33.64 + 55 =
  34. 34.23 + 61 =
  35. 35.42 + 29 =
  36. 36.78 + 58 =
  37. 37.43 + 81 =
  38. 38.37 + 22 =
  39. 39.69 + 77 =
  40. 40.68 + 83 =

Answer key

  1. 145
  2. 98
  3. 97
  4. 121
  5. 151
  6. 101
  7. 144
  8. 83
  9. 162
  10. 107
  11. 145
  12. 64
  13. 108
  14. 119
  15. 98
  16. 67
  17. 133
  18. 92
  19. 102
  20. 65
  21. 107
  22. 76
  23. 103
  24. 100
  25. 98
  26. 93
  27. 109
  28. 55
  29. 120
  30. 115
  31. 70
  32. 108
  33. 119
  34. 84
  35. 71
  36. 136
  37. 124
  38. 59
  39. 146
  40. 151

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