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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 501 · 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 + 63 =
  2. 2.83 + 83 =
  3. 3.51 + 15 =
  4. 4.22 + 31 =
  5. 5.64 + 38 =
  6. 6.59 + 46 =
  7. 7.86 + 19 =
  8. 8.39 + 41 =
  9. 9.56 + 29 =
  10. 10.54 + 76 =
  11. 11.66 + 27 =
  12. 12.31 + 22 =
  13. 13.54 + 34 =
  14. 14.83 + 66 =
  15. 15.26 + 27 =
  16. 16.53 + 56 =
  17. 17.88 + 66 =
  18. 18.48 + 58 =
  19. 19.46 + 32 =
  20. 20.65 + 64 =
  21. 21.33 + 74 =
  22. 22.65 + 45 =
  23. 23.30 + 68 =
  24. 24.79 + 17 =
  25. 25.70 + 84 =
  26. 26.33 + 26 =
  27. 27.60 + 36 =
  28. 28.34 + 12 =
  29. 29.59 + 63 =
  30. 30.63 + 56 =
  31. 31.34 + 13 =
  32. 32.25 + 57 =
  33. 33.41 + 81 =
  34. 34.77 + 27 =
  35. 35.51 + 32 =
  36. 36.40 + 62 =
  37. 37.33 + 34 =
  38. 38.26 + 76 =
  39. 39.26 + 55 =
  40. 40.48 + 14 =

Answer key

  1. 88
  2. 166
  3. 66
  4. 53
  5. 102
  6. 105
  7. 105
  8. 80
  9. 85
  10. 130
  11. 93
  12. 53
  13. 88
  14. 149
  15. 53
  16. 109
  17. 154
  18. 106
  19. 78
  20. 129
  21. 107
  22. 110
  23. 98
  24. 96
  25. 154
  26. 59
  27. 96
  28. 46
  29. 122
  30. 119
  31. 47
  32. 82
  33. 122
  34. 104
  35. 83
  36. 102
  37. 67
  38. 102
  39. 81
  40. 62

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