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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 42 · 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. 1.69 + 28 =
  2. 2.48 + 24 =
  3. 3.69 + 62 =
  4. 4.36 + 61 =
  5. 5.76 + 75 =
  6. 6.54 + 81 =
  7. 7.67 + 31 =
  8. 8.27 + 75 =
  9. 9.29 + 25 =
  10. 10.35 + 49 =
  11. 11.56 + 31 =
  12. 12.30 + 34 =
  13. 13.38 + 67 =
  14. 14.25 + 47 =
  15. 15.78 + 64 =
  16. 16.74 + 54 =
  17. 17.22 + 89 =
  18. 18.30 + 13 =
  19. 19.77 + 61 =
  20. 20.54 + 72 =
  21. 21.78 + 13 =
  22. 22.27 + 34 =
  23. 23.60 + 66 =
  24. 24.87 + 17 =
  25. 25.76 + 65 =
  26. 26.76 + 61 =
  27. 27.56 + 87 =
  28. 28.36 + 26 =
  29. 29.54 + 38 =
  30. 30.22 + 17 =
  31. 31.39 + 24 =
  32. 32.72 + 31 =
  33. 33.25 + 61 =
  34. 34.60 + 77 =
  35. 35.61 + 35 =
  36. 36.57 + 28 =
  37. 37.28 + 58 =
  38. 38.61 + 21 =
  39. 39.87 + 74 =
  40. 40.42 + 71 =

Answer key

  1. 97
  2. 72
  3. 131
  4. 97
  5. 151
  6. 135
  7. 98
  8. 102
  9. 54
  10. 84
  11. 87
  12. 64
  13. 105
  14. 72
  15. 142
  16. 128
  17. 111
  18. 43
  19. 138
  20. 126
  21. 91
  22. 61
  23. 126
  24. 104
  25. 141
  26. 137
  27. 143
  28. 62
  29. 92
  30. 39
  31. 63
  32. 103
  33. 86
  34. 137
  35. 96
  36. 85
  37. 86
  38. 82
  39. 161
  40. 113

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