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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 65 · 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. 1.21 + 55 =
  2. 2.49 + 13 =
  3. 3.49 + 73 =
  4. 4.79 + 44 =
  5. 5.23 + 69 =
  6. 6.82 + 13 =
  7. 7.52 + 85 =
  8. 8.64 + 81 =
  9. 9.49 + 67 =
  10. 10.53 + 53 =
  11. 11.51 + 65 =
  12. 12.81 + 32 =
  13. 13.26 + 54 =
  14. 14.39 + 19 =
  15. 15.37 + 31 =
  16. 16.41 + 86 =
  17. 17.54 + 34 =
  18. 18.50 + 16 =
  19. 19.35 + 21 =
  20. 20.38 + 81 =
  21. 21.22 + 21 =
  22. 22.67 + 21 =
  23. 23.49 + 16 =
  24. 24.40 + 55 =
  25. 25.73 + 46 =
  26. 26.30 + 36 =
  27. 27.88 + 21 =
  28. 28.28 + 54 =
  29. 29.81 + 12 =
  30. 30.52 + 33 =
  31. 31.54 + 86 =
  32. 32.64 + 13 =
  33. 33.84 + 36 =
  34. 34.68 + 74 =
  35. 35.51 + 61 =
  36. 36.42 + 51 =
  37. 37.28 + 39 =
  38. 38.29 + 51 =
  39. 39.26 + 69 =
  40. 40.70 + 58 =

Answer key

  1. 76
  2. 62
  3. 122
  4. 123
  5. 92
  6. 95
  7. 137
  8. 145
  9. 116
  10. 106
  11. 116
  12. 113
  13. 80
  14. 58
  15. 68
  16. 127
  17. 88
  18. 66
  19. 56
  20. 119
  21. 43
  22. 88
  23. 65
  24. 95
  25. 119
  26. 66
  27. 109
  28. 82
  29. 93
  30. 85
  31. 140
  32. 77
  33. 120
  34. 142
  35. 112
  36. 93
  37. 67
  38. 80
  39. 95
  40. 128

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