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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 611 · 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. 1.68 + 32 =
  2. 2.26 + 71 =
  3. 3.83 + 25 =
  4. 4.57 + 19 =
  5. 5.30 + 82 =
  6. 6.62 + 24 =
  7. 7.37 + 33 =
  8. 8.87 + 72 =
  9. 9.33 + 41 =
  10. 10.40 + 38 =
  11. 11.36 + 45 =
  12. 12.37 + 48 =
  13. 13.63 + 64 =
  14. 14.38 + 62 =
  15. 15.52 + 36 =
  16. 16.55 + 21 =
  17. 17.81 + 74 =
  18. 18.41 + 85 =
  19. 19.31 + 36 =
  20. 20.49 + 16 =
  21. 21.39 + 79 =
  22. 22.47 + 24 =
  23. 23.43 + 17 =
  24. 24.71 + 32 =
  25. 25.70 + 81 =
  26. 26.56 + 22 =
  27. 27.45 + 21 =
  28. 28.82 + 27 =
  29. 29.21 + 21 =
  30. 30.85 + 71 =
  31. 31.29 + 51 =
  32. 32.28 + 18 =
  33. 33.45 + 41 =
  34. 34.73 + 14 =
  35. 35.77 + 19 =
  36. 36.77 + 76 =
  37. 37.23 + 64 =
  38. 38.22 + 31 =
  39. 39.40 + 52 =
  40. 40.83 + 37 =

Answer key

  1. 100
  2. 97
  3. 108
  4. 76
  5. 112
  6. 86
  7. 70
  8. 159
  9. 74
  10. 78
  11. 81
  12. 85
  13. 127
  14. 100
  15. 88
  16. 76
  17. 155
  18. 126
  19. 67
  20. 65
  21. 118
  22. 71
  23. 60
  24. 103
  25. 151
  26. 78
  27. 66
  28. 109
  29. 42
  30. 156
  31. 80
  32. 46
  33. 86
  34. 87
  35. 96
  36. 153
  37. 87
  38. 53
  39. 92
  40. 120

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