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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 286 · 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. 1.76 + 27 =
  2. 2.41 + 41 =
  3. 3.27 + 27 =
  4. 4.66 + 46 =
  5. 5.39 + 66 =
  6. 6.73 + 19 =
  7. 7.52 + 23 =
  8. 8.25 + 28 =
  9. 9.41 + 54 =
  10. 10.78 + 46 =
  11. 11.84 + 44 =
  12. 12.81 + 45 =
  13. 13.80 + 34 =
  14. 14.86 + 84 =
  15. 15.38 + 43 =
  16. 16.84 + 39 =
  17. 17.85 + 35 =
  18. 18.52 + 61 =
  19. 19.52 + 41 =
  20. 20.74 + 25 =
  21. 21.77 + 25 =
  22. 22.27 + 39 =
  23. 23.68 + 46 =
  24. 24.89 + 16 =
  25. 25.23 + 41 =
  26. 26.54 + 31 =
  27. 27.22 + 59 =
  28. 28.44 + 48 =
  29. 29.60 + 32 =
  30. 30.38 + 32 =
  31. 31.62 + 18 =
  32. 32.33 + 37 =
  33. 33.25 + 81 =
  34. 34.53 + 49 =
  35. 35.30 + 15 =
  36. 36.25 + 88 =
  37. 37.59 + 51 =
  38. 38.71 + 14 =
  39. 39.44 + 23 =
  40. 40.86 + 27 =

Answer key

  1. 103
  2. 82
  3. 54
  4. 112
  5. 105
  6. 92
  7. 75
  8. 53
  9. 95
  10. 124
  11. 128
  12. 126
  13. 114
  14. 170
  15. 81
  16. 123
  17. 120
  18. 113
  19. 93
  20. 99
  21. 102
  22. 66
  23. 114
  24. 105
  25. 64
  26. 85
  27. 81
  28. 92
  29. 92
  30. 70
  31. 80
  32. 70
  33. 106
  34. 102
  35. 45
  36. 113
  37. 110
  38. 85
  39. 67
  40. 113

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