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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 256 · 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. 1.55 + 82 =
  2. 2.60 + 16 =
  3. 3.21 + 16 =
  4. 4.29 + 24 =
  5. 5.69 + 56 =
  6. 6.73 + 23 =
  7. 7.62 + 33 =
  8. 8.39 + 55 =
  9. 9.23 + 81 =
  10. 10.54 + 19 =
  11. 11.67 + 55 =
  12. 12.48 + 81 =
  13. 13.55 + 46 =
  14. 14.63 + 71 =
  15. 15.65 + 52 =
  16. 16.73 + 21 =
  17. 17.84 + 28 =
  18. 18.85 + 19 =
  19. 19.24 + 55 =
  20. 20.52 + 48 =
  21. 21.28 + 14 =
  22. 22.69 + 82 =
  23. 23.27 + 86 =
  24. 24.59 + 29 =
  25. 25.40 + 14 =
  26. 26.23 + 43 =
  27. 27.55 + 61 =
  28. 28.86 + 19 =
  29. 29.25 + 59 =
  30. 30.64 + 87 =
  31. 31.79 + 35 =
  32. 32.82 + 83 =
  33. 33.70 + 54 =
  34. 34.34 + 64 =
  35. 35.25 + 29 =
  36. 36.66 + 21 =
  37. 37.78 + 33 =
  38. 38.31 + 57 =
  39. 39.88 + 84 =
  40. 40.25 + 86 =

Answer key

  1. 137
  2. 76
  3. 37
  4. 53
  5. 125
  6. 96
  7. 95
  8. 94
  9. 104
  10. 73
  11. 122
  12. 129
  13. 101
  14. 134
  15. 117
  16. 94
  17. 112
  18. 104
  19. 79
  20. 100
  21. 42
  22. 151
  23. 113
  24. 88
  25. 54
  26. 66
  27. 116
  28. 105
  29. 84
  30. 151
  31. 114
  32. 165
  33. 124
  34. 98
  35. 54
  36. 87
  37. 111
  38. 88
  39. 172
  40. 111

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