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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 346 · 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. 1.34 + 42 =
  2. 2.56 + 62 =
  3. 3.45 + 38 =
  4. 4.40 + 75 =
  5. 5.43 + 19 =
  6. 6.66 + 51 =
  7. 7.36 + 37 =
  8. 8.32 + 59 =
  9. 9.89 + 49 =
  10. 10.71 + 34 =
  11. 11.68 + 84 =
  12. 12.81 + 58 =
  13. 13.87 + 61 =
  14. 14.24 + 24 =
  15. 15.26 + 39 =
  16. 16.79 + 31 =
  17. 17.45 + 56 =
  18. 18.37 + 47 =
  19. 19.25 + 88 =
  20. 20.26 + 83 =
  21. 21.57 + 43 =
  22. 22.23 + 71 =
  23. 23.67 + 79 =
  24. 24.25 + 32 =
  25. 25.82 + 56 =
  26. 26.34 + 76 =
  27. 27.47 + 16 =
  28. 28.67 + 19 =
  29. 29.52 + 38 =
  30. 30.22 + 64 =
  31. 31.59 + 49 =
  32. 32.59 + 52 =
  33. 33.39 + 86 =
  34. 34.56 + 61 =
  35. 35.65 + 14 =
  36. 36.89 + 65 =
  37. 37.60 + 42 =
  38. 38.84 + 27 =
  39. 39.87 + 77 =
  40. 40.49 + 55 =

Answer key

  1. 76
  2. 118
  3. 83
  4. 115
  5. 62
  6. 117
  7. 73
  8. 91
  9. 138
  10. 105
  11. 152
  12. 139
  13. 148
  14. 48
  15. 65
  16. 110
  17. 101
  18. 84
  19. 113
  20. 109
  21. 100
  22. 94
  23. 146
  24. 57
  25. 138
  26. 110
  27. 63
  28. 86
  29. 90
  30. 86
  31. 108
  32. 111
  33. 125
  34. 117
  35. 79
  36. 154
  37. 102
  38. 111
  39. 164
  40. 104

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