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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 594 · 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 + 81 =
  2. 2.59 + 41 =
  3. 3.62 + 56 =
  4. 4.55 + 62 =
  5. 5.24 + 25 =
  6. 6.50 + 14 =
  7. 7.68 + 49 =
  8. 8.54 + 54 =
  9. 9.34 + 89 =
  10. 10.81 + 26 =
  11. 11.56 + 53 =
  12. 12.68 + 54 =
  13. 13.41 + 42 =
  14. 14.28 + 41 =
  15. 15.64 + 53 =
  16. 16.22 + 38 =
  17. 17.74 + 87 =
  18. 18.82 + 23 =
  19. 19.86 + 85 =
  20. 20.44 + 78 =
  21. 21.41 + 63 =
  22. 22.77 + 89 =
  23. 23.81 + 33 =
  24. 24.84 + 71 =
  25. 25.28 + 39 =
  26. 26.37 + 61 =
  27. 27.85 + 31 =
  28. 28.40 + 32 =
  29. 29.52 + 27 =
  30. 30.79 + 23 =
  31. 31.54 + 17 =
  32. 32.89 + 29 =
  33. 33.85 + 76 =
  34. 34.69 + 45 =
  35. 35.66 + 21 =
  36. 36.87 + 59 =
  37. 37.48 + 17 =
  38. 38.77 + 21 =
  39. 39.28 + 75 =
  40. 40.63 + 22 =

Answer key

  1. 136
  2. 100
  3. 118
  4. 117
  5. 49
  6. 64
  7. 117
  8. 108
  9. 123
  10. 107
  11. 109
  12. 122
  13. 83
  14. 69
  15. 117
  16. 60
  17. 161
  18. 105
  19. 171
  20. 122
  21. 104
  22. 166
  23. 114
  24. 155
  25. 67
  26. 98
  27. 116
  28. 72
  29. 79
  30. 102
  31. 71
  32. 118
  33. 161
  34. 114
  35. 87
  36. 146
  37. 65
  38. 98
  39. 103
  40. 85

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