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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 903 · 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. 1.45 + 45 =
  2. 2.30 + 22 =
  3. 3.44 + 66 =
  4. 4.86 + 24 =
  5. 5.47 + 84 =
  6. 6.69 + 12 =
  7. 7.65 + 87 =
  8. 8.70 + 25 =
  9. 9.45 + 19 =
  10. 10.65 + 13 =
  11. 11.58 + 76 =
  12. 12.71 + 12 =
  13. 13.28 + 59 =
  14. 14.40 + 21 =
  15. 15.84 + 33 =
  16. 16.33 + 18 =
  17. 17.42 + 21 =
  18. 18.81 + 66 =
  19. 19.73 + 41 =
  20. 20.85 + 69 =
  21. 21.66 + 61 =
  22. 22.37 + 15 =
  23. 23.37 + 82 =
  24. 24.79 + 85 =
  25. 25.23 + 53 =
  26. 26.49 + 56 =
  27. 27.78 + 18 =
  28. 28.53 + 47 =
  29. 29.21 + 54 =
  30. 30.68 + 26 =
  31. 31.38 + 61 =
  32. 32.46 + 46 =
  33. 33.23 + 29 =
  34. 34.87 + 44 =
  35. 35.46 + 61 =
  36. 36.49 + 41 =
  37. 37.57 + 35 =
  38. 38.48 + 15 =
  39. 39.33 + 77 =
  40. 40.82 + 41 =

Answer key

  1. 90
  2. 52
  3. 110
  4. 110
  5. 131
  6. 81
  7. 152
  8. 95
  9. 64
  10. 78
  11. 134
  12. 83
  13. 87
  14. 61
  15. 117
  16. 51
  17. 63
  18. 147
  19. 114
  20. 154
  21. 127
  22. 52
  23. 119
  24. 164
  25. 76
  26. 105
  27. 96
  28. 100
  29. 75
  30. 94
  31. 99
  32. 92
  33. 52
  34. 131
  35. 107
  36. 90
  37. 92
  38. 63
  39. 110
  40. 123

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