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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 791 · 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. 1.64 + 47 =
  2. 2.44 + 65 =
  3. 3.26 + 81 =
  4. 4.58 + 33 =
  5. 5.39 + 83 =
  6. 6.39 + 87 =
  7. 7.82 + 44 =
  8. 8.54 + 61 =
  9. 9.64 + 81 =
  10. 10.78 + 12 =
  11. 11.72 + 12 =
  12. 12.57 + 85 =
  13. 13.88 + 31 =
  14. 14.37 + 81 =
  15. 15.62 + 17 =
  16. 16.39 + 21 =
  17. 17.44 + 71 =
  18. 18.86 + 45 =
  19. 19.26 + 79 =
  20. 20.28 + 87 =
  21. 21.37 + 89 =
  22. 22.35 + 77 =
  23. 23.40 + 42 =
  24. 24.26 + 17 =
  25. 25.69 + 56 =
  26. 26.87 + 51 =
  27. 27.43 + 52 =
  28. 28.44 + 42 =
  29. 29.71 + 66 =
  30. 30.83 + 62 =
  31. 31.27 + 25 =
  32. 32.88 + 51 =
  33. 33.25 + 35 =
  34. 34.70 + 73 =
  35. 35.58 + 81 =
  36. 36.59 + 88 =
  37. 37.82 + 26 =
  38. 38.47 + 36 =
  39. 39.81 + 31 =
  40. 40.40 + 53 =

Answer key

  1. 111
  2. 109
  3. 107
  4. 91
  5. 122
  6. 126
  7. 126
  8. 115
  9. 145
  10. 90
  11. 84
  12. 142
  13. 119
  14. 118
  15. 79
  16. 60
  17. 115
  18. 131
  19. 105
  20. 115
  21. 126
  22. 112
  23. 82
  24. 43
  25. 125
  26. 138
  27. 95
  28. 86
  29. 137
  30. 145
  31. 52
  32. 139
  33. 60
  34. 143
  35. 139
  36. 147
  37. 108
  38. 83
  39. 112
  40. 93

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