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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 933 · 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. 1.62 + 81 =
  2. 2.47 + 53 =
  3. 3.61 + 12 =
  4. 4.81 + 22 =
  5. 5.37 + 54 =
  6. 6.43 + 22 =
  7. 7.72 + 32 =
  8. 8.21 + 41 =
  9. 9.60 + 66 =
  10. 10.73 + 52 =
  11. 11.39 + 41 =
  12. 12.70 + 61 =
  13. 13.82 + 72 =
  14. 14.52 + 88 =
  15. 15.78 + 88 =
  16. 16.69 + 53 =
  17. 17.64 + 78 =
  18. 18.21 + 27 =
  19. 19.69 + 72 =
  20. 20.45 + 41 =
  21. 21.62 + 68 =
  22. 22.47 + 65 =
  23. 23.24 + 29 =
  24. 24.84 + 29 =
  25. 25.48 + 61 =
  26. 26.56 + 82 =
  27. 27.46 + 27 =
  28. 28.64 + 41 =
  29. 29.63 + 13 =
  30. 30.55 + 82 =
  31. 31.36 + 88 =
  32. 32.48 + 37 =
  33. 33.21 + 88 =
  34. 34.87 + 61 =
  35. 35.85 + 24 =
  36. 36.26 + 24 =
  37. 37.44 + 16 =
  38. 38.52 + 22 =
  39. 39.66 + 12 =
  40. 40.78 + 19 =

Answer key

  1. 143
  2. 100
  3. 73
  4. 103
  5. 91
  6. 65
  7. 104
  8. 62
  9. 126
  10. 125
  11. 80
  12. 131
  13. 154
  14. 140
  15. 166
  16. 122
  17. 142
  18. 48
  19. 141
  20. 86
  21. 130
  22. 112
  23. 53
  24. 113
  25. 109
  26. 138
  27. 73
  28. 105
  29. 76
  30. 137
  31. 124
  32. 85
  33. 109
  34. 148
  35. 109
  36. 50
  37. 60
  38. 74
  39. 78
  40. 97

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