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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 839 · 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. 1.25 + 42 =
  2. 2.53 + 49 =
  3. 3.71 + 26 =
  4. 4.73 + 71 =
  5. 5.41 + 31 =
  6. 6.83 + 58 =
  7. 7.21 + 66 =
  8. 8.38 + 83 =
  9. 9.60 + 66 =
  10. 10.37 + 41 =
  11. 11.89 + 14 =
  12. 12.37 + 47 =
  13. 13.47 + 86 =
  14. 14.84 + 27 =
  15. 15.39 + 71 =
  16. 16.74 + 42 =
  17. 17.65 + 49 =
  18. 18.30 + 18 =
  19. 19.70 + 41 =
  20. 20.56 + 81 =
  21. 21.72 + 35 =
  22. 22.52 + 73 =
  23. 23.44 + 66 =
  24. 24.29 + 68 =
  25. 25.70 + 22 =
  26. 26.47 + 54 =
  27. 27.49 + 29 =
  28. 28.76 + 58 =
  29. 29.48 + 85 =
  30. 30.71 + 24 =
  31. 31.21 + 13 =
  32. 32.85 + 25 =
  33. 33.86 + 54 =
  34. 34.83 + 28 =
  35. 35.44 + 27 =
  36. 36.29 + 21 =
  37. 37.43 + 31 =
  38. 38.53 + 25 =
  39. 39.71 + 54 =
  40. 40.43 + 53 =

Answer key

  1. 67
  2. 102
  3. 97
  4. 144
  5. 72
  6. 141
  7. 87
  8. 121
  9. 126
  10. 78
  11. 103
  12. 84
  13. 133
  14. 111
  15. 110
  16. 116
  17. 114
  18. 48
  19. 111
  20. 137
  21. 107
  22. 125
  23. 110
  24. 97
  25. 92
  26. 101
  27. 78
  28. 134
  29. 133
  30. 95
  31. 34
  32. 110
  33. 140
  34. 111
  35. 71
  36. 50
  37. 74
  38. 78
  39. 125
  40. 96

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