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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 838 · 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. 1.77 + 25 =
  2. 2.76 + 14 =
  3. 3.63 + 69 =
  4. 4.23 + 28 =
  5. 5.24 + 28 =
  6. 6.68 + 76 =
  7. 7.29 + 72 =
  8. 8.27 + 76 =
  9. 9.67 + 13 =
  10. 10.76 + 71 =
  11. 11.55 + 14 =
  12. 12.25 + 76 =
  13. 13.22 + 83 =
  14. 14.36 + 65 =
  15. 15.59 + 46 =
  16. 16.79 + 29 =
  17. 17.89 + 21 =
  18. 18.41 + 64 =
  19. 19.68 + 29 =
  20. 20.65 + 41 =
  21. 21.67 + 24 =
  22. 22.65 + 71 =
  23. 23.66 + 87 =
  24. 24.84 + 19 =
  25. 25.83 + 28 =
  26. 26.53 + 84 =
  27. 27.43 + 84 =
  28. 28.35 + 84 =
  29. 29.68 + 67 =
  30. 30.89 + 61 =
  31. 31.22 + 81 =
  32. 32.26 + 54 =
  33. 33.21 + 21 =
  34. 34.75 + 75 =
  35. 35.79 + 53 =
  36. 36.25 + 34 =
  37. 37.43 + 81 =
  38. 38.29 + 43 =
  39. 39.64 + 15 =
  40. 40.58 + 73 =

Answer key

  1. 102
  2. 90
  3. 132
  4. 51
  5. 52
  6. 144
  7. 101
  8. 103
  9. 80
  10. 147
  11. 69
  12. 101
  13. 105
  14. 101
  15. 105
  16. 108
  17. 110
  18. 105
  19. 97
  20. 106
  21. 91
  22. 136
  23. 153
  24. 103
  25. 111
  26. 137
  27. 127
  28. 119
  29. 135
  30. 150
  31. 103
  32. 80
  33. 42
  34. 150
  35. 132
  36. 59
  37. 124
  38. 72
  39. 79
  40. 131

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