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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 238 · 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. 1.59 + 14 =
  2. 2.48 + 24 =
  3. 3.79 + 34 =
  4. 4.77 + 71 =
  5. 5.71 + 44 =
  6. 6.54 + 68 =
  7. 7.42 + 13 =
  8. 8.37 + 42 =
  9. 9.89 + 62 =
  10. 10.39 + 69 =
  11. 11.44 + 31 =
  12. 12.38 + 81 =
  13. 13.69 + 79 =
  14. 14.64 + 84 =
  15. 15.76 + 81 =
  16. 16.70 + 83 =
  17. 17.37 + 44 =
  18. 18.32 + 12 =
  19. 19.44 + 73 =
  20. 20.52 + 24 =
  21. 21.55 + 29 =
  22. 22.70 + 42 =
  23. 23.83 + 79 =
  24. 24.36 + 36 =
  25. 25.48 + 71 =
  26. 26.58 + 81 =
  27. 27.31 + 76 =
  28. 28.24 + 82 =
  29. 29.23 + 31 =
  30. 30.64 + 22 =
  31. 31.75 + 57 =
  32. 32.24 + 85 =
  33. 33.39 + 28 =
  34. 34.44 + 56 =
  35. 35.49 + 21 =
  36. 36.69 + 22 =
  37. 37.23 + 49 =
  38. 38.28 + 83 =
  39. 39.23 + 67 =
  40. 40.35 + 48 =

Answer key

  1. 73
  2. 72
  3. 113
  4. 148
  5. 115
  6. 122
  7. 55
  8. 79
  9. 151
  10. 108
  11. 75
  12. 119
  13. 148
  14. 148
  15. 157
  16. 153
  17. 81
  18. 44
  19. 117
  20. 76
  21. 84
  22. 112
  23. 162
  24. 72
  25. 119
  26. 139
  27. 107
  28. 106
  29. 54
  30. 86
  31. 132
  32. 109
  33. 67
  34. 100
  35. 70
  36. 91
  37. 72
  38. 111
  39. 90
  40. 83

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