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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 536 · 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 + 16 =
  2. 2.77 + 61 =
  3. 3.26 + 71 =
  4. 4.44 + 61 =
  5. 5.36 + 52 =
  6. 6.31 + 66 =
  7. 7.31 + 17 =
  8. 8.42 + 16 =
  9. 9.53 + 36 =
  10. 10.40 + 31 =
  11. 11.61 + 33 =
  12. 12.21 + 39 =
  13. 13.27 + 26 =
  14. 14.25 + 41 =
  15. 15.50 + 69 =
  16. 16.31 + 88 =
  17. 17.83 + 81 =
  18. 18.73 + 51 =
  19. 19.58 + 13 =
  20. 20.66 + 78 =
  21. 21.45 + 71 =
  22. 22.88 + 31 =
  23. 23.89 + 66 =
  24. 24.50 + 16 =
  25. 25.80 + 51 =
  26. 26.23 + 13 =
  27. 27.66 + 87 =
  28. 28.53 + 13 =
  29. 29.37 + 66 =
  30. 30.78 + 32 =
  31. 31.72 + 83 =
  32. 32.28 + 71 =
  33. 33.81 + 65 =
  34. 34.65 + 31 =
  35. 35.62 + 59 =
  36. 36.28 + 53 =
  37. 37.34 + 19 =
  38. 38.66 + 15 =
  39. 39.63 + 67 =
  40. 40.46 + 65 =

Answer key

  1. 48
  2. 138
  3. 97
  4. 105
  5. 88
  6. 97
  7. 48
  8. 58
  9. 89
  10. 71
  11. 94
  12. 60
  13. 53
  14. 66
  15. 119
  16. 119
  17. 164
  18. 124
  19. 71
  20. 144
  21. 116
  22. 119
  23. 155
  24. 66
  25. 131
  26. 36
  27. 153
  28. 66
  29. 103
  30. 110
  31. 155
  32. 99
  33. 146
  34. 96
  35. 121
  36. 81
  37. 53
  38. 81
  39. 130
  40. 111

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