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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 769 · 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. 1.46 + 55 =
  2. 2.65 + 83 =
  3. 3.35 + 63 =
  4. 4.58 + 19 =
  5. 5.54 + 31 =
  6. 6.70 + 32 =
  7. 7.53 + 35 =
  8. 8.37 + 62 =
  9. 9.23 + 85 =
  10. 10.67 + 45 =
  11. 11.38 + 59 =
  12. 12.65 + 29 =
  13. 13.71 + 46 =
  14. 14.38 + 58 =
  15. 15.39 + 81 =
  16. 16.28 + 31 =
  17. 17.83 + 54 =
  18. 18.70 + 26 =
  19. 19.42 + 27 =
  20. 20.29 + 12 =
  21. 21.29 + 56 =
  22. 22.84 + 41 =
  23. 23.75 + 28 =
  24. 24.23 + 76 =
  25. 25.80 + 33 =
  26. 26.54 + 56 =
  27. 27.66 + 84 =
  28. 28.85 + 62 =
  29. 29.66 + 87 =
  30. 30.82 + 68 =
  31. 31.25 + 43 =
  32. 32.64 + 82 =
  33. 33.37 + 45 =
  34. 34.29 + 83 =
  35. 35.67 + 26 =
  36. 36.43 + 61 =
  37. 37.63 + 33 =
  38. 38.35 + 16 =
  39. 39.36 + 28 =
  40. 40.45 + 41 =

Answer key

  1. 101
  2. 148
  3. 98
  4. 77
  5. 85
  6. 102
  7. 88
  8. 99
  9. 108
  10. 112
  11. 97
  12. 94
  13. 117
  14. 96
  15. 120
  16. 59
  17. 137
  18. 96
  19. 69
  20. 41
  21. 85
  22. 125
  23. 103
  24. 99
  25. 113
  26. 110
  27. 150
  28. 147
  29. 153
  30. 150
  31. 68
  32. 146
  33. 82
  34. 112
  35. 93
  36. 104
  37. 96
  38. 51
  39. 64
  40. 86

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