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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 277 · 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. 1.60 + 47 =
  2. 2.35 + 21 =
  3. 3.78 + 67 =
  4. 4.69 + 23 =
  5. 5.63 + 49 =
  6. 6.81 + 71 =
  7. 7.71 + 66 =
  8. 8.45 + 55 =
  9. 9.25 + 16 =
  10. 10.76 + 21 =
  11. 11.73 + 71 =
  12. 12.56 + 19 =
  13. 13.69 + 82 =
  14. 14.21 + 21 =
  15. 15.34 + 26 =
  16. 16.76 + 78 =
  17. 17.51 + 76 =
  18. 18.55 + 78 =
  19. 19.51 + 62 =
  20. 20.30 + 41 =
  21. 21.25 + 84 =
  22. 22.83 + 16 =
  23. 23.22 + 39 =
  24. 24.24 + 34 =
  25. 25.86 + 16 =
  26. 26.53 + 89 =
  27. 27.22 + 29 =
  28. 28.60 + 79 =
  29. 29.57 + 67 =
  30. 30.39 + 38 =
  31. 31.39 + 57 =
  32. 32.59 + 24 =
  33. 33.35 + 51 =
  34. 34.30 + 56 =
  35. 35.74 + 58 =
  36. 36.85 + 22 =
  37. 37.86 + 61 =
  38. 38.37 + 54 =
  39. 39.36 + 51 =
  40. 40.24 + 87 =

Answer key

  1. 107
  2. 56
  3. 145
  4. 92
  5. 112
  6. 152
  7. 137
  8. 100
  9. 41
  10. 97
  11. 144
  12. 75
  13. 151
  14. 42
  15. 60
  16. 154
  17. 127
  18. 133
  19. 113
  20. 71
  21. 109
  22. 99
  23. 61
  24. 58
  25. 102
  26. 142
  27. 51
  28. 139
  29. 124
  30. 77
  31. 96
  32. 83
  33. 86
  34. 86
  35. 132
  36. 107
  37. 147
  38. 91
  39. 87
  40. 111

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