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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 854 · 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. 1.33 + 64 =
  2. 2.33 + 76 =
  3. 3.32 + 55 =
  4. 4.68 + 86 =
  5. 5.64 + 84 =
  6. 6.67 + 45 =
  7. 7.59 + 86 =
  8. 8.51 + 13 =
  9. 9.23 + 67 =
  10. 10.29 + 68 =
  11. 11.22 + 32 =
  12. 12.60 + 61 =
  13. 13.52 + 84 =
  14. 14.72 + 65 =
  15. 15.43 + 84 =
  16. 16.54 + 66 =
  17. 17.30 + 31 =
  18. 18.26 + 25 =
  19. 19.50 + 29 =
  20. 20.55 + 83 =
  21. 21.70 + 58 =
  22. 22.57 + 46 =
  23. 23.83 + 68 =
  24. 24.32 + 17 =
  25. 25.76 + 23 =
  26. 26.81 + 21 =
  27. 27.86 + 27 =
  28. 28.86 + 56 =
  29. 29.62 + 75 =
  30. 30.72 + 41 =
  31. 31.21 + 31 =
  32. 32.49 + 12 =
  33. 33.27 + 82 =
  34. 34.80 + 71 =
  35. 35.25 + 65 =
  36. 36.58 + 33 =
  37. 37.26 + 82 =
  38. 38.67 + 22 =
  39. 39.80 + 58 =
  40. 40.57 + 42 =

Answer key

  1. 97
  2. 109
  3. 87
  4. 154
  5. 148
  6. 112
  7. 145
  8. 64
  9. 90
  10. 97
  11. 54
  12. 121
  13. 136
  14. 137
  15. 127
  16. 120
  17. 61
  18. 51
  19. 79
  20. 138
  21. 128
  22. 103
  23. 151
  24. 49
  25. 99
  26. 102
  27. 113
  28. 142
  29. 137
  30. 113
  31. 52
  32. 61
  33. 109
  34. 151
  35. 90
  36. 91
  37. 108
  38. 89
  39. 138
  40. 99

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