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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 483 · 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. 1.71 + 66 =
  2. 2.71 + 25 =
  3. 3.76 + 83 =
  4. 4.29 + 12 =
  5. 5.71 + 76 =
  6. 6.65 + 61 =
  7. 7.30 + 21 =
  8. 8.32 + 83 =
  9. 9.62 + 45 =
  10. 10.69 + 59 =
  11. 11.73 + 67 =
  12. 12.78 + 84 =
  13. 13.86 + 35 =
  14. 14.75 + 61 =
  15. 15.36 + 46 =
  16. 16.71 + 81 =
  17. 17.64 + 19 =
  18. 18.73 + 44 =
  19. 19.49 + 16 =
  20. 20.86 + 51 =
  21. 21.45 + 35 =
  22. 22.46 + 36 =
  23. 23.55 + 14 =
  24. 24.32 + 19 =
  25. 25.70 + 43 =
  26. 26.55 + 18 =
  27. 27.49 + 41 =
  28. 28.39 + 84 =
  29. 29.63 + 21 =
  30. 30.85 + 51 =
  31. 31.81 + 42 =
  32. 32.78 + 12 =
  33. 33.24 + 31 =
  34. 34.71 + 23 =
  35. 35.47 + 74 =
  36. 36.25 + 89 =
  37. 37.31 + 35 =
  38. 38.27 + 79 =
  39. 39.71 + 29 =
  40. 40.68 + 47 =

Answer key

  1. 137
  2. 96
  3. 159
  4. 41
  5. 147
  6. 126
  7. 51
  8. 115
  9. 107
  10. 128
  11. 140
  12. 162
  13. 121
  14. 136
  15. 82
  16. 152
  17. 83
  18. 117
  19. 65
  20. 137
  21. 80
  22. 82
  23. 69
  24. 51
  25. 113
  26. 73
  27. 90
  28. 123
  29. 84
  30. 136
  31. 123
  32. 90
  33. 55
  34. 94
  35. 121
  36. 114
  37. 66
  38. 106
  39. 100
  40. 115

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