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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 111 · 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. 1.65 + 24 =
  2. 2.65 + 32 =
  3. 3.68 + 68 =
  4. 4.66 + 13 =
  5. 5.89 + 53 =
  6. 6.46 + 71 =
  7. 7.32 + 77 =
  8. 8.44 + 43 =
  9. 9.75 + 34 =
  10. 10.35 + 61 =
  11. 11.32 + 31 =
  12. 12.44 + 73 =
  13. 13.48 + 34 =
  14. 14.21 + 39 =
  15. 15.68 + 59 =
  16. 16.28 + 23 =
  17. 17.35 + 34 =
  18. 18.56 + 81 =
  19. 19.53 + 42 =
  20. 20.29 + 31 =
  21. 21.46 + 46 =
  22. 22.44 + 15 =
  23. 23.30 + 59 =
  24. 24.70 + 49 =
  25. 25.38 + 61 =
  26. 26.68 + 43 =
  27. 27.54 + 84 =
  28. 28.22 + 18 =
  29. 29.60 + 69 =
  30. 30.87 + 45 =
  31. 31.23 + 13 =
  32. 32.83 + 54 =
  33. 33.25 + 28 =
  34. 34.53 + 43 =
  35. 35.29 + 21 =
  36. 36.35 + 59 =
  37. 37.27 + 71 =
  38. 38.50 + 47 =
  39. 39.61 + 81 =
  40. 40.78 + 82 =

Answer key

  1. 89
  2. 97
  3. 136
  4. 79
  5. 142
  6. 117
  7. 109
  8. 87
  9. 109
  10. 96
  11. 63
  12. 117
  13. 82
  14. 60
  15. 127
  16. 51
  17. 69
  18. 137
  19. 95
  20. 60
  21. 92
  22. 59
  23. 89
  24. 119
  25. 99
  26. 111
  27. 138
  28. 40
  29. 129
  30. 132
  31. 36
  32. 137
  33. 53
  34. 96
  35. 50
  36. 94
  37. 98
  38. 97
  39. 142
  40. 160

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