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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 633 · 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. 1.74 + 25 =
  2. 2.73 + 63 =
  3. 3.72 + 61 =
  4. 4.35 + 42 =
  5. 5.51 + 16 =
  6. 6.44 + 32 =
  7. 7.84 + 55 =
  8. 8.45 + 57 =
  9. 9.30 + 14 =
  10. 10.41 + 14 =
  11. 11.71 + 54 =
  12. 12.84 + 46 =
  13. 13.66 + 43 =
  14. 14.83 + 54 =
  15. 15.55 + 59 =
  16. 16.83 + 71 =
  17. 17.65 + 12 =
  18. 18.47 + 49 =
  19. 19.23 + 76 =
  20. 20.31 + 45 =
  21. 21.50 + 87 =
  22. 22.37 + 75 =
  23. 23.49 + 65 =
  24. 24.37 + 67 =
  25. 25.66 + 42 =
  26. 26.45 + 52 =
  27. 27.22 + 42 =
  28. 28.31 + 53 =
  29. 29.57 + 23 =
  30. 30.88 + 17 =
  31. 31.35 + 55 =
  32. 32.21 + 84 =
  33. 33.38 + 65 =
  34. 34.53 + 87 =
  35. 35.71 + 63 =
  36. 36.36 + 89 =
  37. 37.25 + 17 =
  38. 38.65 + 39 =
  39. 39.21 + 51 =
  40. 40.85 + 88 =

Answer key

  1. 99
  2. 136
  3. 133
  4. 77
  5. 67
  6. 76
  7. 139
  8. 102
  9. 44
  10. 55
  11. 125
  12. 130
  13. 109
  14. 137
  15. 114
  16. 154
  17. 77
  18. 96
  19. 99
  20. 76
  21. 137
  22. 112
  23. 114
  24. 104
  25. 108
  26. 97
  27. 64
  28. 84
  29. 80
  30. 105
  31. 90
  32. 105
  33. 103
  34. 140
  35. 134
  36. 125
  37. 42
  38. 104
  39. 72
  40. 173

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