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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 299 · 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. 1.58 + 57 =
  2. 2.38 + 22 =
  3. 3.85 + 31 =
  4. 4.66 + 33 =
  5. 5.23 + 38 =
  6. 6.42 + 89 =
  7. 7.78 + 71 =
  8. 8.75 + 71 =
  9. 9.45 + 54 =
  10. 10.81 + 89 =
  11. 11.21 + 39 =
  12. 12.31 + 51 =
  13. 13.54 + 63 =
  14. 14.76 + 33 =
  15. 15.33 + 35 =
  16. 16.73 + 29 =
  17. 17.49 + 85 =
  18. 18.82 + 76 =
  19. 19.50 + 54 =
  20. 20.37 + 12 =
  21. 21.64 + 51 =
  22. 22.31 + 61 =
  23. 23.88 + 49 =
  24. 24.73 + 83 =
  25. 25.21 + 57 =
  26. 26.47 + 31 =
  27. 27.45 + 43 =
  28. 28.89 + 86 =
  29. 29.70 + 79 =
  30. 30.28 + 41 =
  31. 31.78 + 53 =
  32. 32.50 + 12 =
  33. 33.24 + 23 =
  34. 34.55 + 15 =
  35. 35.89 + 49 =
  36. 36.34 + 61 =
  37. 37.87 + 66 =
  38. 38.75 + 53 =
  39. 39.89 + 83 =
  40. 40.59 + 14 =

Answer key

  1. 115
  2. 60
  3. 116
  4. 99
  5. 61
  6. 131
  7. 149
  8. 146
  9. 99
  10. 170
  11. 60
  12. 82
  13. 117
  14. 109
  15. 68
  16. 102
  17. 134
  18. 158
  19. 104
  20. 49
  21. 115
  22. 92
  23. 137
  24. 156
  25. 78
  26. 78
  27. 88
  28. 175
  29. 149
  30. 69
  31. 131
  32. 62
  33. 47
  34. 70
  35. 138
  36. 95
  37. 153
  38. 128
  39. 172
  40. 73

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