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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 297 · 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. 1.39 + 36 =
  2. 2.45 + 78 =
  3. 3.44 + 31 =
  4. 4.60 + 41 =
  5. 5.24 + 64 =
  6. 6.33 + 78 =
  7. 7.29 + 58 =
  8. 8.35 + 18 =
  9. 9.25 + 12 =
  10. 10.44 + 54 =
  11. 11.48 + 36 =
  12. 12.31 + 19 =
  13. 13.76 + 19 =
  14. 14.31 + 35 =
  15. 15.48 + 52 =
  16. 16.60 + 48 =
  17. 17.25 + 27 =
  18. 18.31 + 22 =
  19. 19.64 + 68 =
  20. 20.21 + 63 =
  21. 21.87 + 26 =
  22. 22.31 + 71 =
  23. 23.82 + 56 =
  24. 24.65 + 23 =
  25. 25.30 + 75 =
  26. 26.51 + 81 =
  27. 27.61 + 56 =
  28. 28.33 + 61 =
  29. 29.64 + 66 =
  30. 30.65 + 56 =
  31. 31.22 + 75 =
  32. 32.67 + 87 =
  33. 33.41 + 53 =
  34. 34.38 + 16 =
  35. 35.28 + 42 =
  36. 36.49 + 76 =
  37. 37.49 + 45 =
  38. 38.54 + 81 =
  39. 39.59 + 75 =
  40. 40.75 + 62 =

Answer key

  1. 75
  2. 123
  3. 75
  4. 101
  5. 88
  6. 111
  7. 87
  8. 53
  9. 37
  10. 98
  11. 84
  12. 50
  13. 95
  14. 66
  15. 100
  16. 108
  17. 52
  18. 53
  19. 132
  20. 84
  21. 113
  22. 102
  23. 138
  24. 88
  25. 105
  26. 132
  27. 117
  28. 94
  29. 130
  30. 121
  31. 97
  32. 154
  33. 94
  34. 54
  35. 70
  36. 125
  37. 94
  38. 135
  39. 134
  40. 137

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