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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 680 · 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. 1.83 + 16 =
  2. 2.50 + 16 =
  3. 3.37 + 69 =
  4. 4.61 + 71 =
  5. 5.66 + 31 =
  6. 6.35 + 44 =
  7. 7.53 + 15 =
  8. 8.49 + 83 =
  9. 9.59 + 19 =
  10. 10.44 + 23 =
  11. 11.82 + 16 =
  12. 12.30 + 87 =
  13. 13.78 + 73 =
  14. 14.43 + 54 =
  15. 15.86 + 58 =
  16. 16.64 + 81 =
  17. 17.27 + 17 =
  18. 18.50 + 64 =
  19. 19.89 + 41 =
  20. 20.48 + 15 =
  21. 21.27 + 23 =
  22. 22.41 + 27 =
  23. 23.57 + 16 =
  24. 24.49 + 62 =
  25. 25.37 + 28 =
  26. 26.50 + 13 =
  27. 27.54 + 21 =
  28. 28.78 + 31 =
  29. 29.23 + 68 =
  30. 30.58 + 68 =
  31. 31.62 + 25 =
  32. 32.22 + 36 =
  33. 33.52 + 17 =
  34. 34.84 + 57 =
  35. 35.58 + 83 =
  36. 36.56 + 72 =
  37. 37.60 + 74 =
  38. 38.54 + 26 =
  39. 39.29 + 55 =
  40. 40.73 + 59 =

Answer key

  1. 99
  2. 66
  3. 106
  4. 132
  5. 97
  6. 79
  7. 68
  8. 132
  9. 78
  10. 67
  11. 98
  12. 117
  13. 151
  14. 97
  15. 144
  16. 145
  17. 44
  18. 114
  19. 130
  20. 63
  21. 50
  22. 68
  23. 73
  24. 111
  25. 65
  26. 63
  27. 75
  28. 109
  29. 91
  30. 126
  31. 87
  32. 58
  33. 69
  34. 141
  35. 141
  36. 128
  37. 134
  38. 80
  39. 84
  40. 132

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