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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 280 · 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. 1.57 + 59 =
  2. 2.66 + 17 =
  3. 3.41 + 83 =
  4. 4.39 + 52 =
  5. 5.24 + 23 =
  6. 6.71 + 37 =
  7. 7.36 + 22 =
  8. 8.71 + 84 =
  9. 9.32 + 21 =
  10. 10.85 + 21 =
  11. 11.32 + 64 =
  12. 12.72 + 34 =
  13. 13.57 + 19 =
  14. 14.22 + 41 =
  15. 15.60 + 34 =
  16. 16.83 + 43 =
  17. 17.57 + 52 =
  18. 18.73 + 33 =
  19. 19.59 + 75 =
  20. 20.36 + 33 =
  21. 21.43 + 85 =
  22. 22.28 + 33 =
  23. 23.81 + 74 =
  24. 24.58 + 39 =
  25. 25.51 + 19 =
  26. 26.33 + 88 =
  27. 27.72 + 37 =
  28. 28.72 + 88 =
  29. 29.25 + 17 =
  30. 30.73 + 86 =
  31. 31.65 + 14 =
  32. 32.54 + 72 =
  33. 33.28 + 57 =
  34. 34.32 + 61 =
  35. 35.28 + 41 =
  36. 36.21 + 31 =
  37. 37.35 + 19 =
  38. 38.21 + 85 =
  39. 39.27 + 33 =
  40. 40.37 + 52 =

Answer key

  1. 116
  2. 83
  3. 124
  4. 91
  5. 47
  6. 108
  7. 58
  8. 155
  9. 53
  10. 106
  11. 96
  12. 106
  13. 76
  14. 63
  15. 94
  16. 126
  17. 109
  18. 106
  19. 134
  20. 69
  21. 128
  22. 61
  23. 155
  24. 97
  25. 70
  26. 121
  27. 109
  28. 160
  29. 42
  30. 159
  31. 79
  32. 126
  33. 85
  34. 93
  35. 69
  36. 52
  37. 54
  38. 106
  39. 60
  40. 89

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