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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 873 · 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. 1.30 + 48 =
  2. 2.31 + 53 =
  3. 3.55 + 34 =
  4. 4.89 + 78 =
  5. 5.37 + 17 =
  6. 6.26 + 26 =
  7. 7.44 + 85 =
  8. 8.45 + 74 =
  9. 9.28 + 36 =
  10. 10.88 + 34 =
  11. 11.55 + 63 =
  12. 12.29 + 76 =
  13. 13.84 + 28 =
  14. 14.50 + 29 =
  15. 15.60 + 37 =
  16. 16.60 + 57 =
  17. 17.39 + 19 =
  18. 18.22 + 83 =
  19. 19.60 + 21 =
  20. 20.69 + 53 =
  21. 21.69 + 21 =
  22. 22.87 + 81 =
  23. 23.67 + 25 =
  24. 24.54 + 24 =
  25. 25.72 + 15 =
  26. 26.37 + 61 =
  27. 27.50 + 76 =
  28. 28.33 + 82 =
  29. 29.42 + 86 =
  30. 30.23 + 13 =
  31. 31.32 + 31 =
  32. 32.37 + 31 =
  33. 33.73 + 23 =
  34. 34.21 + 83 =
  35. 35.39 + 72 =
  36. 36.72 + 56 =
  37. 37.27 + 73 =
  38. 38.55 + 81 =
  39. 39.25 + 57 =
  40. 40.66 + 34 =

Answer key

  1. 78
  2. 84
  3. 89
  4. 167
  5. 54
  6. 52
  7. 129
  8. 119
  9. 64
  10. 122
  11. 118
  12. 105
  13. 112
  14. 79
  15. 97
  16. 117
  17. 58
  18. 105
  19. 81
  20. 122
  21. 90
  22. 168
  23. 92
  24. 78
  25. 87
  26. 98
  27. 126
  28. 115
  29. 128
  30. 36
  31. 63
  32. 68
  33. 96
  34. 104
  35. 111
  36. 128
  37. 100
  38. 136
  39. 82
  40. 100

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