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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 563 · 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. 1.49 + 36 =
  2. 2.42 + 73 =
  3. 3.76 + 48 =
  4. 4.64 + 88 =
  5. 5.24 + 36 =
  6. 6.60 + 78 =
  7. 7.66 + 73 =
  8. 8.88 + 61 =
  9. 9.79 + 17 =
  10. 10.50 + 16 =
  11. 11.38 + 65 =
  12. 12.30 + 78 =
  13. 13.86 + 66 =
  14. 14.46 + 88 =
  15. 15.41 + 27 =
  16. 16.37 + 85 =
  17. 17.24 + 83 =
  18. 18.24 + 23 =
  19. 19.29 + 18 =
  20. 20.26 + 39 =
  21. 21.59 + 82 =
  22. 22.69 + 71 =
  23. 23.49 + 38 =
  24. 24.29 + 15 =
  25. 25.65 + 41 =
  26. 26.25 + 57 =
  27. 27.31 + 23 =
  28. 28.70 + 45 =
  29. 29.58 + 14 =
  30. 30.85 + 52 =
  31. 31.54 + 67 =
  32. 32.68 + 22 =
  33. 33.76 + 28 =
  34. 34.89 + 67 =
  35. 35.77 + 13 =
  36. 36.30 + 17 =
  37. 37.83 + 41 =
  38. 38.30 + 67 =
  39. 39.51 + 34 =
  40. 40.39 + 71 =

Answer key

  1. 85
  2. 115
  3. 124
  4. 152
  5. 60
  6. 138
  7. 139
  8. 149
  9. 96
  10. 66
  11. 103
  12. 108
  13. 152
  14. 134
  15. 68
  16. 122
  17. 107
  18. 47
  19. 47
  20. 65
  21. 141
  22. 140
  23. 87
  24. 44
  25. 106
  26. 82
  27. 54
  28. 115
  29. 72
  30. 137
  31. 121
  32. 90
  33. 104
  34. 156
  35. 90
  36. 47
  37. 124
  38. 97
  39. 85
  40. 110

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