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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 229 · 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. 1.85 + 31 =
  2. 2.47 + 22 =
  3. 3.74 + 52 =
  4. 4.81 + 17 =
  5. 5.66 + 83 =
  6. 6.80 + 67 =
  7. 7.81 + 51 =
  8. 8.32 + 33 =
  9. 9.39 + 31 =
  10. 10.64 + 21 =
  11. 11.69 + 54 =
  12. 12.76 + 57 =
  13. 13.60 + 16 =
  14. 14.28 + 25 =
  15. 15.71 + 35 =
  16. 16.30 + 83 =
  17. 17.22 + 89 =
  18. 18.83 + 73 =
  19. 19.39 + 21 =
  20. 20.74 + 54 =
  21. 21.23 + 45 =
  22. 22.34 + 29 =
  23. 23.83 + 45 =
  24. 24.83 + 21 =
  25. 25.69 + 83 =
  26. 26.53 + 51 =
  27. 27.82 + 55 =
  28. 28.82 + 47 =
  29. 29.45 + 44 =
  30. 30.46 + 46 =
  31. 31.73 + 79 =
  32. 32.31 + 22 =
  33. 33.70 + 49 =
  34. 34.25 + 39 =
  35. 35.40 + 72 =
  36. 36.60 + 37 =
  37. 37.53 + 43 =
  38. 38.42 + 28 =
  39. 39.81 + 87 =
  40. 40.31 + 59 =

Answer key

  1. 116
  2. 69
  3. 126
  4. 98
  5. 149
  6. 147
  7. 132
  8. 65
  9. 70
  10. 85
  11. 123
  12. 133
  13. 76
  14. 53
  15. 106
  16. 113
  17. 111
  18. 156
  19. 60
  20. 128
  21. 68
  22. 63
  23. 128
  24. 104
  25. 152
  26. 104
  27. 137
  28. 129
  29. 89
  30. 92
  31. 152
  32. 53
  33. 119
  34. 64
  35. 112
  36. 97
  37. 96
  38. 70
  39. 168
  40. 90

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