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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 978 · 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. 1.89 + 32 =
  2. 2.21 + 44 =
  3. 3.39 + 88 =
  4. 4.42 + 23 =
  5. 5.61 + 39 =
  6. 6.81 + 82 =
  7. 7.24 + 71 =
  8. 8.75 + 38 =
  9. 9.54 + 27 =
  10. 10.83 + 53 =
  11. 11.64 + 87 =
  12. 12.22 + 69 =
  13. 13.29 + 31 =
  14. 14.44 + 84 =
  15. 15.72 + 74 =
  16. 16.75 + 87 =
  17. 17.34 + 15 =
  18. 18.60 + 73 =
  19. 19.44 + 64 =
  20. 20.61 + 58 =
  21. 21.68 + 51 =
  22. 22.85 + 34 =
  23. 23.35 + 62 =
  24. 24.88 + 21 =
  25. 25.37 + 54 =
  26. 26.53 + 51 =
  27. 27.59 + 37 =
  28. 28.36 + 42 =
  29. 29.71 + 61 =
  30. 30.23 + 59 =
  31. 31.37 + 14 =
  32. 32.78 + 58 =
  33. 33.89 + 13 =
  34. 34.87 + 51 =
  35. 35.60 + 87 =
  36. 36.54 + 63 =
  37. 37.77 + 17 =
  38. 38.56 + 14 =
  39. 39.53 + 53 =
  40. 40.26 + 31 =

Answer key

  1. 121
  2. 65
  3. 127
  4. 65
  5. 100
  6. 163
  7. 95
  8. 113
  9. 81
  10. 136
  11. 151
  12. 91
  13. 60
  14. 128
  15. 146
  16. 162
  17. 49
  18. 133
  19. 108
  20. 119
  21. 119
  22. 119
  23. 97
  24. 109
  25. 91
  26. 104
  27. 96
  28. 78
  29. 132
  30. 82
  31. 51
  32. 136
  33. 102
  34. 138
  35. 147
  36. 117
  37. 94
  38. 70
  39. 106
  40. 57

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