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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 938 · 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 + 79 =
  2. 2.75 + 18 =
  3. 3.38 + 15 =
  4. 4.54 + 69 =
  5. 5.31 + 87 =
  6. 6.64 + 61 =
  7. 7.23 + 13 =
  8. 8.86 + 53 =
  9. 9.39 + 82 =
  10. 10.51 + 78 =
  11. 11.60 + 38 =
  12. 12.83 + 14 =
  13. 13.76 + 75 =
  14. 14.59 + 31 =
  15. 15.43 + 22 =
  16. 16.35 + 45 =
  17. 17.69 + 49 =
  18. 18.70 + 42 =
  19. 19.51 + 29 =
  20. 20.30 + 14 =
  21. 21.79 + 29 =
  22. 22.22 + 22 =
  23. 23.33 + 28 =
  24. 24.25 + 37 =
  25. 25.87 + 79 =
  26. 26.47 + 41 =
  27. 27.21 + 26 =
  28. 28.41 + 32 =
  29. 29.84 + 66 =
  30. 30.89 + 89 =
  31. 31.26 + 18 =
  32. 32.57 + 41 =
  33. 33.56 + 12 =
  34. 34.84 + 35 =
  35. 35.73 + 28 =
  36. 36.84 + 41 =
  37. 37.52 + 84 =
  38. 38.51 + 24 =
  39. 39.80 + 14 =
  40. 40.64 + 21 =

Answer key

  1. 158
  2. 93
  3. 53
  4. 123
  5. 118
  6. 125
  7. 36
  8. 139
  9. 121
  10. 129
  11. 98
  12. 97
  13. 151
  14. 90
  15. 65
  16. 80
  17. 118
  18. 112
  19. 80
  20. 44
  21. 108
  22. 44
  23. 61
  24. 62
  25. 166
  26. 88
  27. 47
  28. 73
  29. 150
  30. 178
  31. 44
  32. 98
  33. 68
  34. 119
  35. 101
  36. 125
  37. 136
  38. 75
  39. 94
  40. 85

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