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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 867 · 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. 1.74 + 35 =
  2. 2.74 + 59 =
  3. 3.67 + 61 =
  4. 4.31 + 59 =
  5. 5.54 + 21 =
  6. 6.32 + 33 =
  7. 7.30 + 81 =
  8. 8.35 + 21 =
  9. 9.40 + 19 =
  10. 10.80 + 75 =
  11. 11.39 + 54 =
  12. 12.30 + 15 =
  13. 13.75 + 38 =
  14. 14.77 + 13 =
  15. 15.31 + 31 =
  16. 16.73 + 71 =
  17. 17.62 + 21 =
  18. 18.33 + 13 =
  19. 19.27 + 81 =
  20. 20.28 + 87 =
  21. 21.29 + 81 =
  22. 22.75 + 88 =
  23. 23.34 + 59 =
  24. 24.82 + 61 =
  25. 25.64 + 63 =
  26. 26.75 + 16 =
  27. 27.49 + 26 =
  28. 28.31 + 27 =
  29. 29.85 + 88 =
  30. 30.36 + 17 =
  31. 31.66 + 16 =
  32. 32.41 + 15 =
  33. 33.35 + 36 =
  34. 34.62 + 34 =
  35. 35.37 + 53 =
  36. 36.35 + 34 =
  37. 37.46 + 27 =
  38. 38.34 + 78 =
  39. 39.78 + 44 =
  40. 40.40 + 63 =

Answer key

  1. 109
  2. 133
  3. 128
  4. 90
  5. 75
  6. 65
  7. 111
  8. 56
  9. 59
  10. 155
  11. 93
  12. 45
  13. 113
  14. 90
  15. 62
  16. 144
  17. 83
  18. 46
  19. 108
  20. 115
  21. 110
  22. 163
  23. 93
  24. 143
  25. 127
  26. 91
  27. 75
  28. 58
  29. 173
  30. 53
  31. 82
  32. 56
  33. 71
  34. 96
  35. 90
  36. 69
  37. 73
  38. 112
  39. 122
  40. 103

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