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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 16 · 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. 1.86 + 39 =
  2. 2.63 + 41 =
  3. 3.31 + 27 =
  4. 4.55 + 85 =
  5. 5.39 + 81 =
  6. 6.69 + 21 =
  7. 7.39 + 65 =
  8. 8.85 + 78 =
  9. 9.57 + 77 =
  10. 10.45 + 18 =
  11. 11.82 + 73 =
  12. 12.23 + 78 =
  13. 13.54 + 14 =
  14. 14.54 + 51 =
  15. 15.46 + 61 =
  16. 16.89 + 37 =
  17. 17.44 + 21 =
  18. 18.30 + 89 =
  19. 19.32 + 33 =
  20. 20.68 + 41 =
  21. 21.68 + 37 =
  22. 22.60 + 81 =
  23. 23.54 + 26 =
  24. 24.78 + 14 =
  25. 25.44 + 33 =
  26. 26.81 + 87 =
  27. 27.27 + 57 =
  28. 28.32 + 27 =
  29. 29.36 + 23 =
  30. 30.37 + 66 =
  31. 31.51 + 15 =
  32. 32.67 + 17 =
  33. 33.34 + 54 =
  34. 34.35 + 64 =
  35. 35.27 + 41 =
  36. 36.47 + 82 =
  37. 37.26 + 18 =
  38. 38.24 + 44 =
  39. 39.78 + 45 =
  40. 40.85 + 28 =

Answer key

  1. 125
  2. 104
  3. 58
  4. 140
  5. 120
  6. 90
  7. 104
  8. 163
  9. 134
  10. 63
  11. 155
  12. 101
  13. 68
  14. 105
  15. 107
  16. 126
  17. 65
  18. 119
  19. 65
  20. 109
  21. 105
  22. 141
  23. 80
  24. 92
  25. 77
  26. 168
  27. 84
  28. 59
  29. 59
  30. 103
  31. 66
  32. 84
  33. 88
  34. 99
  35. 68
  36. 129
  37. 44
  38. 68
  39. 123
  40. 113

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