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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 532 · 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. 1.31 + 29 =
  2. 2.58 + 39 =
  3. 3.48 + 57 =
  4. 4.75 + 29 =
  5. 5.76 + 32 =
  6. 6.82 + 31 =
  7. 7.64 + 36 =
  8. 8.21 + 31 =
  9. 9.83 + 24 =
  10. 10.77 + 15 =
  11. 11.71 + 58 =
  12. 12.26 + 13 =
  13. 13.69 + 18 =
  14. 14.70 + 31 =
  15. 15.50 + 33 =
  16. 16.31 + 41 =
  17. 17.42 + 33 =
  18. 18.34 + 32 =
  19. 19.47 + 52 =
  20. 20.44 + 43 =
  21. 21.31 + 54 =
  22. 22.87 + 89 =
  23. 23.55 + 41 =
  24. 24.65 + 25 =
  25. 25.51 + 81 =
  26. 26.48 + 21 =
  27. 27.78 + 38 =
  28. 28.39 + 79 =
  29. 29.67 + 15 =
  30. 30.38 + 79 =
  31. 31.44 + 16 =
  32. 32.58 + 12 =
  33. 33.76 + 57 =
  34. 34.26 + 54 =
  35. 35.45 + 28 =
  36. 36.86 + 51 =
  37. 37.30 + 14 =
  38. 38.33 + 45 =
  39. 39.27 + 32 =
  40. 40.22 + 27 =

Answer key

  1. 60
  2. 97
  3. 105
  4. 104
  5. 108
  6. 113
  7. 100
  8. 52
  9. 107
  10. 92
  11. 129
  12. 39
  13. 87
  14. 101
  15. 83
  16. 72
  17. 75
  18. 66
  19. 99
  20. 87
  21. 85
  22. 176
  23. 96
  24. 90
  25. 132
  26. 69
  27. 116
  28. 118
  29. 82
  30. 117
  31. 60
  32. 70
  33. 133
  34. 80
  35. 73
  36. 137
  37. 44
  38. 78
  39. 59
  40. 49

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