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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 766 · 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. 1.73 + 72 =
  2. 2.38 + 33 =
  3. 3.55 + 55 =
  4. 4.89 + 73 =
  5. 5.31 + 85 =
  6. 6.36 + 59 =
  7. 7.79 + 34 =
  8. 8.48 + 53 =
  9. 9.87 + 75 =
  10. 10.86 + 58 =
  11. 11.68 + 71 =
  12. 12.86 + 69 =
  13. 13.52 + 83 =
  14. 14.32 + 33 =
  15. 15.81 + 22 =
  16. 16.83 + 66 =
  17. 17.28 + 85 =
  18. 18.54 + 47 =
  19. 19.33 + 13 =
  20. 20.78 + 62 =
  21. 21.49 + 31 =
  22. 22.69 + 12 =
  23. 23.69 + 71 =
  24. 24.82 + 37 =
  25. 25.38 + 21 =
  26. 26.65 + 56 =
  27. 27.59 + 31 =
  28. 28.87 + 17 =
  29. 29.69 + 47 =
  30. 30.38 + 31 =
  31. 31.87 + 38 =
  32. 32.37 + 17 =
  33. 33.65 + 72 =
  34. 34.66 + 54 =
  35. 35.75 + 88 =
  36. 36.34 + 68 =
  37. 37.38 + 61 =
  38. 38.34 + 52 =
  39. 39.86 + 71 =
  40. 40.74 + 85 =

Answer key

  1. 145
  2. 71
  3. 110
  4. 162
  5. 116
  6. 95
  7. 113
  8. 101
  9. 162
  10. 144
  11. 139
  12. 155
  13. 135
  14. 65
  15. 103
  16. 149
  17. 113
  18. 101
  19. 46
  20. 140
  21. 80
  22. 81
  23. 140
  24. 119
  25. 59
  26. 121
  27. 90
  28. 104
  29. 116
  30. 69
  31. 125
  32. 54
  33. 137
  34. 120
  35. 163
  36. 102
  37. 99
  38. 86
  39. 157
  40. 159

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