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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 344 · 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. 1.32 + 66 =
  2. 2.89 + 38 =
  3. 3.75 + 37 =
  4. 4.84 + 21 =
  5. 5.59 + 38 =
  6. 6.62 + 81 =
  7. 7.42 + 48 =
  8. 8.87 + 48 =
  9. 9.50 + 12 =
  10. 10.85 + 59 =
  11. 11.62 + 15 =
  12. 12.43 + 35 =
  13. 13.78 + 19 =
  14. 14.47 + 12 =
  15. 15.53 + 32 =
  16. 16.62 + 14 =
  17. 17.52 + 87 =
  18. 18.45 + 49 =
  19. 19.30 + 57 =
  20. 20.74 + 14 =
  21. 21.41 + 54 =
  22. 22.39 + 78 =
  23. 23.45 + 16 =
  24. 24.77 + 34 =
  25. 25.27 + 34 =
  26. 26.51 + 54 =
  27. 27.54 + 59 =
  28. 28.87 + 51 =
  29. 29.85 + 83 =
  30. 30.22 + 14 =
  31. 31.66 + 41 =
  32. 32.54 + 29 =
  33. 33.24 + 47 =
  34. 34.47 + 68 =
  35. 35.73 + 65 =
  36. 36.26 + 26 =
  37. 37.61 + 68 =
  38. 38.60 + 62 =
  39. 39.24 + 61 =
  40. 40.54 + 75 =

Answer key

  1. 98
  2. 127
  3. 112
  4. 105
  5. 97
  6. 143
  7. 90
  8. 135
  9. 62
  10. 144
  11. 77
  12. 78
  13. 97
  14. 59
  15. 85
  16. 76
  17. 139
  18. 94
  19. 87
  20. 88
  21. 95
  22. 117
  23. 61
  24. 111
  25. 61
  26. 105
  27. 113
  28. 138
  29. 168
  30. 36
  31. 107
  32. 83
  33. 71
  34. 115
  35. 138
  36. 52
  37. 129
  38. 122
  39. 85
  40. 129

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