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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 487 · 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. 1.32 + 88 =
  2. 2.72 + 29 =
  3. 3.38 + 23 =
  4. 4.24 + 13 =
  5. 5.87 + 62 =
  6. 6.68 + 89 =
  7. 7.87 + 18 =
  8. 8.83 + 41 =
  9. 9.81 + 81 =
  10. 10.77 + 31 =
  11. 11.33 + 18 =
  12. 12.59 + 14 =
  13. 13.32 + 27 =
  14. 14.77 + 18 =
  15. 15.74 + 49 =
  16. 16.39 + 56 =
  17. 17.73 + 31 =
  18. 18.34 + 85 =
  19. 19.52 + 41 =
  20. 20.36 + 24 =
  21. 21.21 + 39 =
  22. 22.53 + 57 =
  23. 23.71 + 18 =
  24. 24.39 + 34 =
  25. 25.75 + 33 =
  26. 26.40 + 85 =
  27. 27.26 + 86 =
  28. 28.74 + 74 =
  29. 29.39 + 61 =
  30. 30.82 + 77 =
  31. 31.33 + 71 =
  32. 32.89 + 88 =
  33. 33.44 + 64 =
  34. 34.42 + 31 =
  35. 35.44 + 27 =
  36. 36.42 + 52 =
  37. 37.24 + 63 =
  38. 38.58 + 52 =
  39. 39.78 + 23 =
  40. 40.55 + 79 =

Answer key

  1. 120
  2. 101
  3. 61
  4. 37
  5. 149
  6. 157
  7. 105
  8. 124
  9. 162
  10. 108
  11. 51
  12. 73
  13. 59
  14. 95
  15. 123
  16. 95
  17. 104
  18. 119
  19. 93
  20. 60
  21. 60
  22. 110
  23. 89
  24. 73
  25. 108
  26. 125
  27. 112
  28. 148
  29. 100
  30. 159
  31. 104
  32. 177
  33. 108
  34. 73
  35. 71
  36. 94
  37. 87
  38. 110
  39. 101
  40. 134

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