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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 41 · 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. 1.79 + 28 =
  2. 2.71 + 61 =
  3. 3.38 + 47 =
  4. 4.56 + 54 =
  5. 5.72 + 58 =
  6. 6.63 + 42 =
  7. 7.83 + 15 =
  8. 8.54 + 77 =
  9. 9.77 + 21 =
  10. 10.35 + 85 =
  11. 11.85 + 36 =
  12. 12.31 + 71 =
  13. 13.70 + 46 =
  14. 14.82 + 27 =
  15. 15.72 + 47 =
  16. 16.52 + 43 =
  17. 17.47 + 38 =
  18. 18.72 + 69 =
  19. 19.45 + 85 =
  20. 20.49 + 21 =
  21. 21.61 + 69 =
  22. 22.72 + 34 =
  23. 23.85 + 27 =
  24. 24.67 + 58 =
  25. 25.30 + 86 =
  26. 26.70 + 61 =
  27. 27.88 + 77 =
  28. 28.43 + 33 =
  29. 29.74 + 49 =
  30. 30.89 + 61 =
  31. 31.83 + 47 =
  32. 32.25 + 59 =
  33. 33.82 + 16 =
  34. 34.39 + 17 =
  35. 35.74 + 31 =
  36. 36.78 + 57 =
  37. 37.56 + 13 =
  38. 38.40 + 13 =
  39. 39.66 + 24 =
  40. 40.21 + 33 =

Answer key

  1. 107
  2. 132
  3. 85
  4. 110
  5. 130
  6. 105
  7. 98
  8. 131
  9. 98
  10. 120
  11. 121
  12. 102
  13. 116
  14. 109
  15. 119
  16. 95
  17. 85
  18. 141
  19. 130
  20. 70
  21. 130
  22. 106
  23. 112
  24. 125
  25. 116
  26. 131
  27. 165
  28. 76
  29. 123
  30. 150
  31. 130
  32. 84
  33. 98
  34. 56
  35. 105
  36. 135
  37. 69
  38. 53
  39. 90
  40. 54

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