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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 542 · 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 + 36 =
  2. 2.21 + 36 =
  3. 3.54 + 29 =
  4. 4.41 + 61 =
  5. 5.28 + 73 =
  6. 6.29 + 71 =
  7. 7.45 + 45 =
  8. 8.58 + 79 =
  9. 9.88 + 82 =
  10. 10.84 + 59 =
  11. 11.38 + 83 =
  12. 12.40 + 81 =
  13. 13.57 + 63 =
  14. 14.72 + 57 =
  15. 15.83 + 65 =
  16. 16.23 + 23 =
  17. 17.26 + 33 =
  18. 18.62 + 14 =
  19. 19.51 + 38 =
  20. 20.46 + 62 =
  21. 21.21 + 34 =
  22. 22.40 + 62 =
  23. 23.69 + 25 =
  24. 24.28 + 61 =
  25. 25.60 + 37 =
  26. 26.80 + 32 =
  27. 27.29 + 24 =
  28. 28.64 + 46 =
  29. 29.75 + 59 =
  30. 30.33 + 24 =
  31. 31.84 + 39 =
  32. 32.28 + 78 =
  33. 33.85 + 13 =
  34. 34.62 + 72 =
  35. 35.33 + 67 =
  36. 36.74 + 66 =
  37. 37.78 + 44 =
  38. 38.57 + 82 =
  39. 39.41 + 23 =
  40. 40.42 + 26 =

Answer key

  1. 68
  2. 57
  3. 83
  4. 102
  5. 101
  6. 100
  7. 90
  8. 137
  9. 170
  10. 143
  11. 121
  12. 121
  13. 120
  14. 129
  15. 148
  16. 46
  17. 59
  18. 76
  19. 89
  20. 108
  21. 55
  22. 102
  23. 94
  24. 89
  25. 97
  26. 112
  27. 53
  28. 110
  29. 134
  30. 57
  31. 123
  32. 106
  33. 98
  34. 134
  35. 100
  36. 140
  37. 122
  38. 139
  39. 64
  40. 68

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