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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 353 · 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. 1.23 + 83 =
  2. 2.26 + 56 =
  3. 3.24 + 81 =
  4. 4.30 + 76 =
  5. 5.66 + 82 =
  6. 6.84 + 72 =
  7. 7.44 + 59 =
  8. 8.71 + 51 =
  9. 9.41 + 59 =
  10. 10.61 + 15 =
  11. 11.39 + 25 =
  12. 12.54 + 16 =
  13. 13.35 + 22 =
  14. 14.57 + 46 =
  15. 15.25 + 64 =
  16. 16.39 + 13 =
  17. 17.75 + 32 =
  18. 18.23 + 53 =
  19. 19.66 + 65 =
  20. 20.72 + 39 =
  21. 21.62 + 21 =
  22. 22.43 + 47 =
  23. 23.46 + 37 =
  24. 24.31 + 49 =
  25. 25.22 + 41 =
  26. 26.32 + 55 =
  27. 27.78 + 34 =
  28. 28.24 + 45 =
  29. 29.32 + 39 =
  30. 30.66 + 29 =
  31. 31.46 + 89 =
  32. 32.23 + 87 =
  33. 33.45 + 81 =
  34. 34.42 + 38 =
  35. 35.72 + 45 =
  36. 36.30 + 21 =
  37. 37.62 + 22 =
  38. 38.78 + 39 =
  39. 39.45 + 47 =
  40. 40.63 + 13 =

Answer key

  1. 106
  2. 82
  3. 105
  4. 106
  5. 148
  6. 156
  7. 103
  8. 122
  9. 100
  10. 76
  11. 64
  12. 70
  13. 57
  14. 103
  15. 89
  16. 52
  17. 107
  18. 76
  19. 131
  20. 111
  21. 83
  22. 90
  23. 83
  24. 80
  25. 63
  26. 87
  27. 112
  28. 69
  29. 71
  30. 95
  31. 135
  32. 110
  33. 126
  34. 80
  35. 117
  36. 51
  37. 84
  38. 117
  39. 92
  40. 76

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