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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 629 · 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. 1.28 + 13 =
  2. 2.77 + 48 =
  3. 3.35 + 33 =
  4. 4.38 + 45 =
  5. 5.88 + 57 =
  6. 6.73 + 81 =
  7. 7.59 + 21 =
  8. 8.34 + 47 =
  9. 9.31 + 37 =
  10. 10.71 + 46 =
  11. 11.25 + 28 =
  12. 12.72 + 29 =
  13. 13.65 + 57 =
  14. 14.82 + 17 =
  15. 15.55 + 14 =
  16. 16.68 + 16 =
  17. 17.80 + 53 =
  18. 18.86 + 24 =
  19. 19.69 + 14 =
  20. 20.69 + 26 =
  21. 21.62 + 57 =
  22. 22.62 + 47 =
  23. 23.40 + 23 =
  24. 24.86 + 39 =
  25. 25.32 + 71 =
  26. 26.38 + 72 =
  27. 27.62 + 14 =
  28. 28.55 + 79 =
  29. 29.71 + 44 =
  30. 30.32 + 74 =
  31. 31.46 + 83 =
  32. 32.79 + 23 =
  33. 33.60 + 14 =
  34. 34.82 + 52 =
  35. 35.33 + 82 =
  36. 36.54 + 22 =
  37. 37.72 + 41 =
  38. 38.21 + 16 =
  39. 39.74 + 41 =
  40. 40.34 + 34 =

Answer key

  1. 41
  2. 125
  3. 68
  4. 83
  5. 145
  6. 154
  7. 80
  8. 81
  9. 68
  10. 117
  11. 53
  12. 101
  13. 122
  14. 99
  15. 69
  16. 84
  17. 133
  18. 110
  19. 83
  20. 95
  21. 119
  22. 109
  23. 63
  24. 125
  25. 103
  26. 110
  27. 76
  28. 134
  29. 115
  30. 106
  31. 129
  32. 102
  33. 74
  34. 134
  35. 115
  36. 76
  37. 113
  38. 37
  39. 115
  40. 68

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