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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 305 · 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. 1.38 + 89 =
  2. 2.34 + 87 =
  3. 3.38 + 79 =
  4. 4.27 + 25 =
  5. 5.84 + 71 =
  6. 6.58 + 34 =
  7. 7.81 + 68 =
  8. 8.23 + 51 =
  9. 9.74 + 79 =
  10. 10.52 + 87 =
  11. 11.84 + 53 =
  12. 12.51 + 36 =
  13. 13.47 + 41 =
  14. 14.71 + 83 =
  15. 15.39 + 69 =
  16. 16.30 + 72 =
  17. 17.44 + 77 =
  18. 18.80 + 23 =
  19. 19.28 + 41 =
  20. 20.26 + 14 =
  21. 21.22 + 82 =
  22. 22.45 + 24 =
  23. 23.35 + 26 =
  24. 24.46 + 12 =
  25. 25.28 + 23 =
  26. 26.22 + 19 =
  27. 27.47 + 32 =
  28. 28.27 + 53 =
  29. 29.46 + 42 =
  30. 30.70 + 13 =
  31. 31.45 + 81 =
  32. 32.65 + 69 =
  33. 33.44 + 26 =
  34. 34.55 + 51 =
  35. 35.61 + 17 =
  36. 36.23 + 26 =
  37. 37.52 + 76 =
  38. 38.67 + 79 =
  39. 39.82 + 18 =
  40. 40.54 + 21 =

Answer key

  1. 127
  2. 121
  3. 117
  4. 52
  5. 155
  6. 92
  7. 149
  8. 74
  9. 153
  10. 139
  11. 137
  12. 87
  13. 88
  14. 154
  15. 108
  16. 102
  17. 121
  18. 103
  19. 69
  20. 40
  21. 104
  22. 69
  23. 61
  24. 58
  25. 51
  26. 41
  27. 79
  28. 80
  29. 88
  30. 83
  31. 126
  32. 134
  33. 70
  34. 106
  35. 78
  36. 49
  37. 128
  38. 146
  39. 100
  40. 75

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