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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 905 · 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 + 89 =
  2. 2.40 + 52 =
  3. 3.25 + 28 =
  4. 4.79 + 87 =
  5. 5.78 + 26 =
  6. 6.26 + 23 =
  7. 7.33 + 35 =
  8. 8.55 + 39 =
  9. 9.71 + 26 =
  10. 10.39 + 14 =
  11. 11.80 + 33 =
  12. 12.53 + 34 =
  13. 13.39 + 46 =
  14. 14.57 + 79 =
  15. 15.77 + 81 =
  16. 16.88 + 56 =
  17. 17.60 + 88 =
  18. 18.45 + 34 =
  19. 19.27 + 32 =
  20. 20.75 + 34 =
  21. 21.28 + 41 =
  22. 22.45 + 71 =
  23. 23.47 + 21 =
  24. 24.43 + 31 =
  25. 25.81 + 31 =
  26. 26.70 + 16 =
  27. 27.87 + 81 =
  28. 28.75 + 86 =
  29. 29.33 + 88 =
  30. 30.22 + 31 =
  31. 31.24 + 61 =
  32. 32.59 + 87 =
  33. 33.89 + 71 =
  34. 34.62 + 39 =
  35. 35.84 + 18 =
  36. 36.28 + 69 =
  37. 37.63 + 61 =
  38. 38.54 + 28 =
  39. 39.53 + 58 =
  40. 40.38 + 39 =

Answer key

  1. 134
  2. 92
  3. 53
  4. 166
  5. 104
  6. 49
  7. 68
  8. 94
  9. 97
  10. 53
  11. 113
  12. 87
  13. 85
  14. 136
  15. 158
  16. 144
  17. 148
  18. 79
  19. 59
  20. 109
  21. 69
  22. 116
  23. 68
  24. 74
  25. 112
  26. 86
  27. 168
  28. 161
  29. 121
  30. 53
  31. 85
  32. 146
  33. 160
  34. 101
  35. 102
  36. 97
  37. 124
  38. 82
  39. 111
  40. 77

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