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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 217 · 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. 1.78 + 69 =
  2. 2.22 + 46 =
  3. 3.69 + 31 =
  4. 4.88 + 19 =
  5. 5.83 + 15 =
  6. 6.23 + 42 =
  7. 7.69 + 85 =
  8. 8.38 + 78 =
  9. 9.78 + 81 =
  10. 10.23 + 59 =
  11. 11.87 + 73 =
  12. 12.86 + 52 =
  13. 13.70 + 41 =
  14. 14.25 + 68 =
  15. 15.47 + 42 =
  16. 16.56 + 31 =
  17. 17.42 + 29 =
  18. 18.74 + 69 =
  19. 19.30 + 12 =
  20. 20.71 + 26 =
  21. 21.53 + 56 =
  22. 22.52 + 29 =
  23. 23.69 + 52 =
  24. 24.71 + 65 =
  25. 25.44 + 79 =
  26. 26.36 + 16 =
  27. 27.42 + 54 =
  28. 28.39 + 31 =
  29. 29.79 + 24 =
  30. 30.84 + 21 =
  31. 31.35 + 65 =
  32. 32.66 + 42 =
  33. 33.86 + 34 =
  34. 34.28 + 74 =
  35. 35.83 + 21 =
  36. 36.55 + 66 =
  37. 37.25 + 28 =
  38. 38.40 + 22 =
  39. 39.56 + 38 =
  40. 40.47 + 89 =

Answer key

  1. 147
  2. 68
  3. 100
  4. 107
  5. 98
  6. 65
  7. 154
  8. 116
  9. 159
  10. 82
  11. 160
  12. 138
  13. 111
  14. 93
  15. 89
  16. 87
  17. 71
  18. 143
  19. 42
  20. 97
  21. 109
  22. 81
  23. 121
  24. 136
  25. 123
  26. 52
  27. 96
  28. 70
  29. 103
  30. 105
  31. 100
  32. 108
  33. 120
  34. 102
  35. 104
  36. 121
  37. 53
  38. 62
  39. 94
  40. 136

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