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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 482 · 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. 1.60 + 76 =
  2. 2.82 + 83 =
  3. 3.66 + 29 =
  4. 4.37 + 73 =
  5. 5.81 + 42 =
  6. 6.33 + 57 =
  7. 7.80 + 81 =
  8. 8.52 + 77 =
  9. 9.22 + 35 =
  10. 10.56 + 71 =
  11. 11.25 + 21 =
  12. 12.89 + 75 =
  13. 13.21 + 59 =
  14. 14.74 + 42 =
  15. 15.23 + 54 =
  16. 16.24 + 71 =
  17. 17.30 + 51 =
  18. 18.39 + 21 =
  19. 19.30 + 35 =
  20. 20.48 + 39 =
  21. 21.41 + 21 =
  22. 22.40 + 48 =
  23. 23.47 + 42 =
  24. 24.47 + 69 =
  25. 25.39 + 23 =
  26. 26.80 + 21 =
  27. 27.65 + 37 =
  28. 28.24 + 31 =
  29. 29.66 + 22 =
  30. 30.42 + 29 =
  31. 31.32 + 73 =
  32. 32.50 + 59 =
  33. 33.29 + 81 =
  34. 34.23 + 75 =
  35. 35.60 + 39 =
  36. 36.46 + 51 =
  37. 37.40 + 57 =
  38. 38.55 + 49 =
  39. 39.63 + 36 =
  40. 40.40 + 14 =

Answer key

  1. 136
  2. 165
  3. 95
  4. 110
  5. 123
  6. 90
  7. 161
  8. 129
  9. 57
  10. 127
  11. 46
  12. 164
  13. 80
  14. 116
  15. 77
  16. 95
  17. 81
  18. 60
  19. 65
  20. 87
  21. 62
  22. 88
  23. 89
  24. 116
  25. 62
  26. 101
  27. 102
  28. 55
  29. 88
  30. 71
  31. 105
  32. 109
  33. 110
  34. 98
  35. 99
  36. 97
  37. 97
  38. 104
  39. 99
  40. 54

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