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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 352 · 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. 1.33 + 42 =
  2. 2.87 + 72 =
  3. 3.59 + 46 =
  4. 4.66 + 67 =
  5. 5.30 + 15 =
  6. 6.45 + 46 =
  7. 7.73 + 82 =
  8. 8.25 + 64 =
  9. 9.88 + 85 =
  10. 10.77 + 36 =
  11. 11.21 + 67 =
  12. 12.72 + 28 =
  13. 13.84 + 48 =
  14. 14.25 + 85 =
  15. 15.25 + 22 =
  16. 16.39 + 86 =
  17. 17.62 + 15 =
  18. 18.54 + 45 =
  19. 19.64 + 65 =
  20. 20.86 + 55 =
  21. 21.75 + 46 =
  22. 22.26 + 35 =
  23. 23.51 + 68 =
  24. 24.36 + 71 =
  25. 25.28 + 43 =
  26. 26.46 + 23 =
  27. 27.38 + 14 =
  28. 28.30 + 87 =
  29. 29.77 + 28 =
  30. 30.21 + 76 =
  31. 31.36 + 17 =
  32. 32.59 + 24 =
  33. 33.46 + 49 =
  34. 34.24 + 69 =
  35. 35.82 + 12 =
  36. 36.59 + 42 =
  37. 37.74 + 54 =
  38. 38.31 + 31 =
  39. 39.32 + 51 =
  40. 40.66 + 16 =

Answer key

  1. 75
  2. 159
  3. 105
  4. 133
  5. 45
  6. 91
  7. 155
  8. 89
  9. 173
  10. 113
  11. 88
  12. 100
  13. 132
  14. 110
  15. 47
  16. 125
  17. 77
  18. 99
  19. 129
  20. 141
  21. 121
  22. 61
  23. 119
  24. 107
  25. 71
  26. 69
  27. 52
  28. 117
  29. 105
  30. 97
  31. 53
  32. 83
  33. 95
  34. 93
  35. 94
  36. 101
  37. 128
  38. 62
  39. 83
  40. 82

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