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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 809 · 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. 1.50 + 53 =
  2. 2.30 + 44 =
  3. 3.31 + 17 =
  4. 4.79 + 12 =
  5. 5.72 + 12 =
  6. 6.36 + 81 =
  7. 7.27 + 31 =
  8. 8.23 + 25 =
  9. 9.65 + 15 =
  10. 10.72 + 57 =
  11. 11.46 + 32 =
  12. 12.46 + 78 =
  13. 13.86 + 77 =
  14. 14.29 + 26 =
  15. 15.84 + 78 =
  16. 16.48 + 35 =
  17. 17.64 + 14 =
  18. 18.58 + 68 =
  19. 19.46 + 51 =
  20. 20.57 + 89 =
  21. 21.55 + 64 =
  22. 22.85 + 14 =
  23. 23.48 + 33 =
  24. 24.71 + 46 =
  25. 25.23 + 19 =
  26. 26.80 + 83 =
  27. 27.63 + 82 =
  28. 28.62 + 66 =
  29. 29.50 + 64 =
  30. 30.31 + 57 =
  31. 31.27 + 42 =
  32. 32.39 + 61 =
  33. 33.35 + 81 =
  34. 34.33 + 15 =
  35. 35.38 + 52 =
  36. 36.82 + 72 =
  37. 37.46 + 16 =
  38. 38.58 + 51 =
  39. 39.27 + 81 =
  40. 40.30 + 72 =

Answer key

  1. 103
  2. 74
  3. 48
  4. 91
  5. 84
  6. 117
  7. 58
  8. 48
  9. 80
  10. 129
  11. 78
  12. 124
  13. 163
  14. 55
  15. 162
  16. 83
  17. 78
  18. 126
  19. 97
  20. 146
  21. 119
  22. 99
  23. 81
  24. 117
  25. 42
  26. 163
  27. 145
  28. 128
  29. 114
  30. 88
  31. 69
  32. 100
  33. 116
  34. 48
  35. 90
  36. 154
  37. 62
  38. 109
  39. 108
  40. 102

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