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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 865 · 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. 1.37 + 15 =
  2. 2.72 + 59 =
  3. 3.51 + 62 =
  4. 4.60 + 73 =
  5. 5.78 + 36 =
  6. 6.53 + 82 =
  7. 7.28 + 47 =
  8. 8.24 + 34 =
  9. 9.30 + 42 =
  10. 10.75 + 48 =
  11. 11.62 + 75 =
  12. 12.44 + 72 =
  13. 13.83 + 13 =
  14. 14.76 + 57 =
  15. 15.76 + 37 =
  16. 16.82 + 31 =
  17. 17.70 + 37 =
  18. 18.31 + 37 =
  19. 19.35 + 54 =
  20. 20.72 + 82 =
  21. 21.41 + 36 =
  22. 22.72 + 57 =
  23. 23.74 + 32 =
  24. 24.40 + 74 =
  25. 25.62 + 84 =
  26. 26.33 + 17 =
  27. 27.23 + 14 =
  28. 28.80 + 52 =
  29. 29.66 + 73 =
  30. 30.65 + 41 =
  31. 31.76 + 18 =
  32. 32.89 + 46 =
  33. 33.54 + 34 =
  34. 34.32 + 21 =
  35. 35.37 + 85 =
  36. 36.22 + 83 =
  37. 37.25 + 28 =
  38. 38.75 + 19 =
  39. 39.66 + 35 =
  40. 40.40 + 59 =

Answer key

  1. 52
  2. 131
  3. 113
  4. 133
  5. 114
  6. 135
  7. 75
  8. 58
  9. 72
  10. 123
  11. 137
  12. 116
  13. 96
  14. 133
  15. 113
  16. 113
  17. 107
  18. 68
  19. 89
  20. 154
  21. 77
  22. 129
  23. 106
  24. 114
  25. 146
  26. 50
  27. 37
  28. 132
  29. 139
  30. 106
  31. 94
  32. 135
  33. 88
  34. 53
  35. 122
  36. 105
  37. 53
  38. 94
  39. 101
  40. 99

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