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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 307 · 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. 1.38 + 87 =
  2. 2.59 + 57 =
  3. 3.23 + 61 =
  4. 4.66 + 29 =
  5. 5.88 + 83 =
  6. 6.54 + 61 =
  7. 7.69 + 69 =
  8. 8.22 + 79 =
  9. 9.45 + 55 =
  10. 10.65 + 22 =
  11. 11.32 + 64 =
  12. 12.51 + 57 =
  13. 13.57 + 14 =
  14. 14.24 + 26 =
  15. 15.23 + 49 =
  16. 16.60 + 53 =
  17. 17.71 + 82 =
  18. 18.82 + 84 =
  19. 19.72 + 58 =
  20. 20.45 + 51 =
  21. 21.39 + 12 =
  22. 22.38 + 18 =
  23. 23.77 + 28 =
  24. 24.55 + 16 =
  25. 25.56 + 74 =
  26. 26.83 + 76 =
  27. 27.42 + 37 =
  28. 28.64 + 44 =
  29. 29.42 + 64 =
  30. 30.68 + 89 =
  31. 31.68 + 61 =
  32. 32.24 + 81 =
  33. 33.58 + 54 =
  34. 34.46 + 82 =
  35. 35.30 + 21 =
  36. 36.83 + 39 =
  37. 37.28 + 35 =
  38. 38.76 + 69 =
  39. 39.84 + 38 =
  40. 40.29 + 38 =

Answer key

  1. 125
  2. 116
  3. 84
  4. 95
  5. 171
  6. 115
  7. 138
  8. 101
  9. 100
  10. 87
  11. 96
  12. 108
  13. 71
  14. 50
  15. 72
  16. 113
  17. 153
  18. 166
  19. 130
  20. 96
  21. 51
  22. 56
  23. 105
  24. 71
  25. 130
  26. 159
  27. 79
  28. 108
  29. 106
  30. 157
  31. 129
  32. 105
  33. 112
  34. 128
  35. 51
  36. 122
  37. 63
  38. 145
  39. 122
  40. 67

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