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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 481 · 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. 1.89 + 33 =
  2. 2.78 + 62 =
  3. 3.37 + 46 =
  4. 4.38 + 84 =
  5. 5.77 + 81 =
  6. 6.80 + 85 =
  7. 7.25 + 76 =
  8. 8.22 + 83 =
  9. 9.77 + 53 =
  10. 10.42 + 85 =
  11. 11.70 + 65 =
  12. 12.51 + 41 =
  13. 13.65 + 89 =
  14. 14.42 + 89 =
  15. 15.40 + 29 =
  16. 16.57 + 81 =
  17. 17.87 + 16 =
  18. 18.31 + 47 =
  19. 19.60 + 23 =
  20. 20.69 + 24 =
  21. 21.46 + 85 =
  22. 22.41 + 25 =
  23. 23.41 + 51 =
  24. 24.37 + 84 =
  25. 25.80 + 88 =
  26. 26.24 + 54 =
  27. 27.69 + 69 =
  28. 28.35 + 61 =
  29. 29.71 + 51 =
  30. 30.77 + 58 =
  31. 31.34 + 83 =
  32. 32.60 + 14 =
  33. 33.81 + 71 =
  34. 34.50 + 38 =
  35. 35.36 + 61 =
  36. 36.73 + 47 =
  37. 37.36 + 75 =
  38. 38.81 + 55 =
  39. 39.42 + 61 =
  40. 40.74 + 33 =

Answer key

  1. 122
  2. 140
  3. 83
  4. 122
  5. 158
  6. 165
  7. 101
  8. 105
  9. 130
  10. 127
  11. 135
  12. 92
  13. 154
  14. 131
  15. 69
  16. 138
  17. 103
  18. 78
  19. 83
  20. 93
  21. 131
  22. 66
  23. 92
  24. 121
  25. 168
  26. 78
  27. 138
  28. 96
  29. 122
  30. 135
  31. 117
  32. 74
  33. 152
  34. 88
  35. 97
  36. 120
  37. 111
  38. 136
  39. 103
  40. 107

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