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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 910 · 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. 1.54 + 16 =
  2. 2.21 + 67 =
  3. 3.31 + 73 =
  4. 4.32 + 24 =
  5. 5.72 + 54 =
  6. 6.77 + 87 =
  7. 7.38 + 51 =
  8. 8.25 + 38 =
  9. 9.24 + 84 =
  10. 10.49 + 37 =
  11. 11.66 + 73 =
  12. 12.78 + 17 =
  13. 13.86 + 82 =
  14. 14.39 + 27 =
  15. 15.83 + 58 =
  16. 16.57 + 54 =
  17. 17.62 + 33 =
  18. 18.36 + 26 =
  19. 19.75 + 36 =
  20. 20.81 + 14 =
  21. 21.30 + 36 =
  22. 22.85 + 44 =
  23. 23.53 + 12 =
  24. 24.21 + 41 =
  25. 25.24 + 44 =
  26. 26.52 + 48 =
  27. 27.65 + 41 =
  28. 28.86 + 21 =
  29. 29.44 + 37 =
  30. 30.48 + 72 =
  31. 31.57 + 66 =
  32. 32.81 + 54 =
  33. 33.31 + 71 =
  34. 34.83 + 88 =
  35. 35.73 + 65 =
  36. 36.21 + 28 =
  37. 37.46 + 46 =
  38. 38.75 + 25 =
  39. 39.40 + 41 =
  40. 40.56 + 52 =

Answer key

  1. 70
  2. 88
  3. 104
  4. 56
  5. 126
  6. 164
  7. 89
  8. 63
  9. 108
  10. 86
  11. 139
  12. 95
  13. 168
  14. 66
  15. 141
  16. 111
  17. 95
  18. 62
  19. 111
  20. 95
  21. 66
  22. 129
  23. 65
  24. 62
  25. 68
  26. 100
  27. 106
  28. 107
  29. 81
  30. 120
  31. 123
  32. 135
  33. 102
  34. 171
  35. 138
  36. 49
  37. 92
  38. 100
  39. 81
  40. 108

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