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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 173 · 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. 1.25 + 64 =
  2. 2.23 + 71 =
  3. 3.66 + 66 =
  4. 4.78 + 71 =
  5. 5.42 + 24 =
  6. 6.55 + 78 =
  7. 7.58 + 79 =
  8. 8.72 + 19 =
  9. 9.43 + 61 =
  10. 10.65 + 71 =
  11. 11.29 + 71 =
  12. 12.88 + 41 =
  13. 13.40 + 22 =
  14. 14.73 + 24 =
  15. 15.51 + 34 =
  16. 16.25 + 54 =
  17. 17.41 + 48 =
  18. 18.36 + 23 =
  19. 19.45 + 27 =
  20. 20.61 + 33 =
  21. 21.83 + 67 =
  22. 22.21 + 81 =
  23. 23.83 + 52 =
  24. 24.79 + 82 =
  25. 25.48 + 34 =
  26. 26.36 + 72 =
  27. 27.30 + 36 =
  28. 28.32 + 58 =
  29. 29.74 + 78 =
  30. 30.40 + 61 =
  31. 31.40 + 82 =
  32. 32.36 + 46 =
  33. 33.48 + 13 =
  34. 34.31 + 88 =
  35. 35.43 + 25 =
  36. 36.29 + 34 =
  37. 37.47 + 61 =
  38. 38.34 + 42 =
  39. 39.49 + 64 =
  40. 40.40 + 42 =

Answer key

  1. 89
  2. 94
  3. 132
  4. 149
  5. 66
  6. 133
  7. 137
  8. 91
  9. 104
  10. 136
  11. 100
  12. 129
  13. 62
  14. 97
  15. 85
  16. 79
  17. 89
  18. 59
  19. 72
  20. 94
  21. 150
  22. 102
  23. 135
  24. 161
  25. 82
  26. 108
  27. 66
  28. 90
  29. 152
  30. 101
  31. 122
  32. 82
  33. 61
  34. 119
  35. 68
  36. 63
  37. 108
  38. 76
  39. 113
  40. 82

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