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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 636 · 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. 1.39 + 53 =
  2. 2.60 + 61 =
  3. 3.73 + 15 =
  4. 4.52 + 14 =
  5. 5.31 + 89 =
  6. 6.80 + 51 =
  7. 7.61 + 33 =
  8. 8.62 + 57 =
  9. 9.48 + 75 =
  10. 10.36 + 88 =
  11. 11.76 + 43 =
  12. 12.23 + 13 =
  13. 13.37 + 52 =
  14. 14.43 + 25 =
  15. 15.43 + 75 =
  16. 16.70 + 88 =
  17. 17.66 + 23 =
  18. 18.87 + 48 =
  19. 19.49 + 31 =
  20. 20.66 + 81 =
  21. 21.36 + 81 =
  22. 22.24 + 32 =
  23. 23.78 + 15 =
  24. 24.28 + 15 =
  25. 25.62 + 76 =
  26. 26.55 + 14 =
  27. 27.61 + 86 =
  28. 28.67 + 24 =
  29. 29.69 + 85 =
  30. 30.64 + 27 =
  31. 31.85 + 75 =
  32. 32.53 + 35 =
  33. 33.47 + 85 =
  34. 34.27 + 34 =
  35. 35.70 + 83 =
  36. 36.82 + 15 =
  37. 37.60 + 16 =
  38. 38.65 + 28 =
  39. 39.32 + 81 =
  40. 40.86 + 66 =

Answer key

  1. 92
  2. 121
  3. 88
  4. 66
  5. 120
  6. 131
  7. 94
  8. 119
  9. 123
  10. 124
  11. 119
  12. 36
  13. 89
  14. 68
  15. 118
  16. 158
  17. 89
  18. 135
  19. 80
  20. 147
  21. 117
  22. 56
  23. 93
  24. 43
  25. 138
  26. 69
  27. 147
  28. 91
  29. 154
  30. 91
  31. 160
  32. 88
  33. 132
  34. 61
  35. 153
  36. 97
  37. 76
  38. 93
  39. 113
  40. 152

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