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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 181 · 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 + 14 =
  2. 2.86 + 32 =
  3. 3.58 + 81 =
  4. 4.48 + 21 =
  5. 5.22 + 65 =
  6. 6.42 + 64 =
  7. 7.30 + 75 =
  8. 8.73 + 21 =
  9. 9.22 + 21 =
  10. 10.86 + 38 =
  11. 11.83 + 52 =
  12. 12.67 + 28 =
  13. 13.72 + 53 =
  14. 14.39 + 61 =
  15. 15.83 + 46 =
  16. 16.37 + 23 =
  17. 17.25 + 51 =
  18. 18.67 + 62 =
  19. 19.23 + 19 =
  20. 20.86 + 69 =
  21. 21.61 + 17 =
  22. 22.70 + 32 =
  23. 23.35 + 67 =
  24. 24.66 + 53 =
  25. 25.72 + 74 =
  26. 26.51 + 37 =
  27. 27.53 + 28 =
  28. 28.79 + 75 =
  29. 29.65 + 72 =
  30. 30.25 + 58 =
  31. 31.70 + 12 =
  32. 32.42 + 81 =
  33. 33.80 + 64 =
  34. 34.41 + 34 =
  35. 35.47 + 85 =
  36. 36.30 + 61 =
  37. 37.30 + 23 =
  38. 38.68 + 25 =
  39. 39.86 + 71 =
  40. 40.77 + 44 =

Answer key

  1. 39
  2. 118
  3. 139
  4. 69
  5. 87
  6. 106
  7. 105
  8. 94
  9. 43
  10. 124
  11. 135
  12. 95
  13. 125
  14. 100
  15. 129
  16. 60
  17. 76
  18. 129
  19. 42
  20. 155
  21. 78
  22. 102
  23. 102
  24. 119
  25. 146
  26. 88
  27. 81
  28. 154
  29. 137
  30. 83
  31. 82
  32. 123
  33. 144
  34. 75
  35. 132
  36. 91
  37. 53
  38. 93
  39. 157
  40. 121

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