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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 866 · 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. 1.23 + 86 =
  2. 2.48 + 45 =
  3. 3.62 + 34 =
  4. 4.24 + 29 =
  5. 5.28 + 55 =
  6. 6.42 + 55 =
  7. 7.41 + 31 =
  8. 8.51 + 24 =
  9. 9.85 + 81 =
  10. 10.65 + 53 =
  11. 11.77 + 21 =
  12. 12.43 + 15 =
  13. 13.30 + 46 =
  14. 14.40 + 26 =
  15. 15.61 + 24 =
  16. 16.70 + 27 =
  17. 17.81 + 45 =
  18. 18.87 + 53 =
  19. 19.29 + 39 =
  20. 20.39 + 28 =
  21. 21.61 + 83 =
  22. 22.24 + 43 =
  23. 23.43 + 49 =
  24. 24.66 + 35 =
  25. 25.24 + 38 =
  26. 26.33 + 61 =
  27. 27.73 + 77 =
  28. 28.56 + 38 =
  29. 29.34 + 44 =
  30. 30.33 + 53 =
  31. 31.51 + 84 =
  32. 32.44 + 82 =
  33. 33.49 + 67 =
  34. 34.38 + 32 =
  35. 35.89 + 59 =
  36. 36.76 + 31 =
  37. 37.32 + 34 =
  38. 38.24 + 71 =
  39. 39.49 + 38 =
  40. 40.47 + 28 =

Answer key

  1. 109
  2. 93
  3. 96
  4. 53
  5. 83
  6. 97
  7. 72
  8. 75
  9. 166
  10. 118
  11. 98
  12. 58
  13. 76
  14. 66
  15. 85
  16. 97
  17. 126
  18. 140
  19. 68
  20. 67
  21. 144
  22. 67
  23. 92
  24. 101
  25. 62
  26. 94
  27. 150
  28. 94
  29. 78
  30. 86
  31. 135
  32. 126
  33. 116
  34. 70
  35. 148
  36. 107
  37. 66
  38. 95
  39. 87
  40. 75

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