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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 514 · 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. 1.65 + 16 =
  2. 2.56 + 54 =
  3. 3.75 + 87 =
  4. 4.26 + 26 =
  5. 5.61 + 83 =
  6. 6.87 + 32 =
  7. 7.67 + 24 =
  8. 8.36 + 85 =
  9. 9.84 + 37 =
  10. 10.27 + 75 =
  11. 11.59 + 51 =
  12. 12.87 + 15 =
  13. 13.79 + 55 =
  14. 14.71 + 26 =
  15. 15.71 + 83 =
  16. 16.31 + 41 =
  17. 17.71 + 16 =
  18. 18.42 + 43 =
  19. 19.55 + 52 =
  20. 20.87 + 63 =
  21. 21.70 + 69 =
  22. 22.44 + 82 =
  23. 23.31 + 72 =
  24. 24.31 + 33 =
  25. 25.46 + 66 =
  26. 26.75 + 14 =
  27. 27.25 + 51 =
  28. 28.38 + 71 =
  29. 29.50 + 87 =
  30. 30.43 + 58 =
  31. 31.33 + 31 =
  32. 32.82 + 84 =
  33. 33.35 + 47 =
  34. 34.25 + 68 =
  35. 35.32 + 58 =
  36. 36.65 + 12 =
  37. 37.87 + 26 =
  38. 38.34 + 89 =
  39. 39.37 + 51 =
  40. 40.33 + 64 =

Answer key

  1. 81
  2. 110
  3. 162
  4. 52
  5. 144
  6. 119
  7. 91
  8. 121
  9. 121
  10. 102
  11. 110
  12. 102
  13. 134
  14. 97
  15. 154
  16. 72
  17. 87
  18. 85
  19. 107
  20. 150
  21. 139
  22. 126
  23. 103
  24. 64
  25. 112
  26. 89
  27. 76
  28. 109
  29. 137
  30. 101
  31. 64
  32. 166
  33. 82
  34. 93
  35. 90
  36. 77
  37. 113
  38. 123
  39. 88
  40. 97

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