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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 86 · 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. 1.52 + 81 =
  2. 2.55 + 47 =
  3. 3.78 + 55 =
  4. 4.70 + 81 =
  5. 5.26 + 27 =
  6. 6.41 + 67 =
  7. 7.60 + 35 =
  8. 8.31 + 15 =
  9. 9.29 + 21 =
  10. 10.49 + 72 =
  11. 11.49 + 81 =
  12. 12.70 + 88 =
  13. 13.25 + 35 =
  14. 14.66 + 71 =
  15. 15.42 + 35 =
  16. 16.60 + 19 =
  17. 17.21 + 81 =
  18. 18.36 + 62 =
  19. 19.52 + 47 =
  20. 20.40 + 75 =
  21. 21.73 + 48 =
  22. 22.66 + 15 =
  23. 23.56 + 81 =
  24. 24.51 + 26 =
  25. 25.83 + 71 =
  26. 26.63 + 35 =
  27. 27.64 + 51 =
  28. 28.87 + 15 =
  29. 29.62 + 15 =
  30. 30.52 + 82 =
  31. 31.69 + 83 =
  32. 32.50 + 51 =
  33. 33.41 + 33 =
  34. 34.66 + 31 =
  35. 35.31 + 31 =
  36. 36.49 + 49 =
  37. 37.34 + 49 =
  38. 38.50 + 61 =
  39. 39.29 + 28 =
  40. 40.50 + 34 =

Answer key

  1. 133
  2. 102
  3. 133
  4. 151
  5. 53
  6. 108
  7. 95
  8. 46
  9. 50
  10. 121
  11. 130
  12. 158
  13. 60
  14. 137
  15. 77
  16. 79
  17. 102
  18. 98
  19. 99
  20. 115
  21. 121
  22. 81
  23. 137
  24. 77
  25. 154
  26. 98
  27. 115
  28. 102
  29. 77
  30. 134
  31. 152
  32. 101
  33. 74
  34. 97
  35. 62
  36. 98
  37. 83
  38. 111
  39. 57
  40. 84

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