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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 295 · 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. 1.50 + 82 =
  2. 2.56 + 47 =
  3. 3.59 + 74 =
  4. 4.33 + 66 =
  5. 5.42 + 67 =
  6. 6.61 + 36 =
  7. 7.84 + 46 =
  8. 8.37 + 23 =
  9. 9.53 + 81 =
  10. 10.54 + 21 =
  11. 11.63 + 81 =
  12. 12.79 + 31 =
  13. 13.87 + 78 =
  14. 14.58 + 29 =
  15. 15.27 + 33 =
  16. 16.32 + 71 =
  17. 17.69 + 62 =
  18. 18.39 + 57 =
  19. 19.28 + 21 =
  20. 20.89 + 31 =
  21. 21.60 + 22 =
  22. 22.47 + 17 =
  23. 23.48 + 16 =
  24. 24.50 + 71 =
  25. 25.39 + 13 =
  26. 26.86 + 79 =
  27. 27.79 + 86 =
  28. 28.70 + 76 =
  29. 29.45 + 72 =
  30. 30.31 + 89 =
  31. 31.79 + 81 =
  32. 32.37 + 51 =
  33. 33.40 + 61 =
  34. 34.23 + 18 =
  35. 35.39 + 31 =
  36. 36.64 + 21 =
  37. 37.48 + 31 =
  38. 38.66 + 53 =
  39. 39.49 + 22 =
  40. 40.39 + 12 =

Answer key

  1. 132
  2. 103
  3. 133
  4. 99
  5. 109
  6. 97
  7. 130
  8. 60
  9. 134
  10. 75
  11. 144
  12. 110
  13. 165
  14. 87
  15. 60
  16. 103
  17. 131
  18. 96
  19. 49
  20. 120
  21. 82
  22. 64
  23. 64
  24. 121
  25. 52
  26. 165
  27. 165
  28. 146
  29. 117
  30. 120
  31. 160
  32. 88
  33. 101
  34. 41
  35. 70
  36. 85
  37. 79
  38. 119
  39. 71
  40. 51

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